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18202030 = 2572112307
BaseRepresentation
bin100010101101…
…1110110101110
31021020202111021
41011123312232
514124431110
61450044354
7310500100
oct105336656
937222437
1018202030
11a302500
1261196ba
133a03c42
1425bb570
1518e82da
hex115bdae

18202030 has 72 divisors (see below), whose sum is σ = 42029064. Its totient is φ = 5654880.

The previous prime is 18202003. The next prime is 18202033. The reversal of 18202030 is 3020281.

It is a happy number.

It is a super-2 number, since 2×182020302 = 662627792241800, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 18201995 and 18202013.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18202033) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 59137 + ... + 59443.

It is an arithmetic number, because the mean of its divisors is an integer number (583737).

Almost surely, 218202030 is an apocalyptic number.

18202030 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

18202030 is an abundant number, since it is smaller than the sum of its proper divisors (23827034).

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

18202030 is a wasteful number, since it uses less digits than its factorization.

18202030 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 350 (or 332 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 16.

The square root of 18202030 is about 4266.3837145761. The cubic root of 18202030 is about 263.0509908023.

The spelling of 18202030 in words is "eighteen million, two hundred two thousand, thirty".

Divisors: 1 2 5 7 10 11 14 22 35 49 55 70 77 98 110 121 154 242 245 307 385 490 539 605 614 770 847 1078 1210 1535 1694 2149 2695 3070 3377 4235 4298 5390 5929 6754 8470 10745 11858 15043 16885 21490 23639 29645 30086 33770 37147 47278 59290 74294 75215 118195 150430 165473 185735 236390 260029 330946 371470 520058 827365 1300145 1654730 1820203 2600290 3640406 9101015 18202030