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18506968060 = 22571711876551
BaseRepresentation
bin10001001111000110…
…011110101111111100
31202202210010101110111
4101033012132233330
5300400240434220
612300232315404
71223422430050
oct211706365774
952683111414
1018506968060
117937779029
123705b42b64
13198c285199
14c77cb7c60
15734b4b15a
hex44f19ebfc

18506968060 has 96 divisors (see below), whose sum is σ = 47076277248. Its totient is φ = 5966054400.

The previous prime is 18506968021. The next prime is 18506968061. The reversal of 18506968060 is 6086960581.

It is a junction number, because it is equal to n+sod(n) for n = 18506967995 and 18506968013.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18506968061) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2821785 + ... + 2828335.

It is an arithmetic number, because the mean of its divisors is an integer number (490377888).

Almost surely, 218506968060 is an apocalyptic number.

18506968060 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18506968060, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23538138624).

18506968060 is an abundant number, since it is smaller than the sum of its proper divisors (28569309188).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

18506968060 is a wasteful number, since it uses less digits than its factorization.

18506968060 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7771 (or 7769 counting only the distinct ones).

The product of its (nonzero) digits is 622080, while the sum is 49.

The spelling of 18506968060 in words is "eighteen billion, five hundred six million, nine hundred sixty-eight thousand, sixty".

Divisors: 1 2 4 5 7 10 14 17 20 28 34 35 68 70 85 119 140 170 238 340 476 595 1187 1190 2374 2380 4748 5935 6551 8309 11870 13102 16618 20179 23740 26204 32755 33236 40358 41545 45857 65510 80716 83090 91714 100895 111367 131020 141253 166180 183428 201790 222734 229285 282506 403580 445468 458570 556835 565012 706265 779569 917140 1113670 1412530 1559138 2227340 2825060 3118276 3897845 7776037 7795690 15552074 15591380 31104148 38880185 54432259 77760370 108864518 132192629 155520740 217729036 264385258 272161295 528770516 544322590 660963145 925348403 1088645180 1321926290 1850696806 2643852580 3701393612 4626742015 9253484030 18506968060