Search a number
-
+
18048468380 = 2257112710189
BaseRepresentation
bin10000110011110001…
…011100010110011100
31201120211101012010212
4100303301130112130
5243430401442010
612142533151552
71206154310225
oct206361342634
951524335125
1018048468380
117721987478
1235b848b5b8
1319182a07b7
14c3304624c
1570977e505
hex433c5c59c

18048468380 has 24 divisors (see below), whose sum is σ = 38435614560. Its totient is φ = 7117705280.

The previous prime is 18048468377. The next prime is 18048468397. The reversal of 18048468380 is 8386484081.

It is a super-4 number, since 4×180484683804 (a number of 42 digits) contains 4444 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6353675 + ... + 6356514.

It is an arithmetic number, because the mean of its divisors is an integer number (1601483940).

Almost surely, 218048468380 is an apocalyptic number.

18048468380 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18048468380 is an abundant number, since it is smaller than the sum of its proper divisors (20387146180).

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

18048468380 is a wasteful number, since it uses less digits than its factorization.

18048468380 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12710269 (or 12710267 counting only the distinct ones).

The product of its (nonzero) digits is 1179648, while the sum is 50.

The spelling of 18048468380 in words is "eighteen billion, forty-eight million, four hundred sixty-eight thousand, three hundred eighty".

Divisors: 1 2 4 5 10 20 71 142 284 355 710 1420 12710189 25420378 50840756 63550945 127101890 254203780 902423419 1804846838 3609693676 4512117095 9024234190 18048468380