18057164500 has 24 divisors (see below), whose sum is σ = 39436848360. Its totient is φ = 7222865600.

The previous prime is 18057164479. The next prime is 18057164513. The reversal of 18057164500 is 546175081.

It can be written as a sum of positive squares in 4 ways, for example, as 130096836 + 17927067664 = 11406^2 + 133892^2 .

It is a super-2 number, since 2×18057164500² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 18057164500.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18056665 + ... + 18057664.

It is an arithmetic number, because the mean of its divisors is an integer number (1643202015).

Almost surely, 2^18057164500 is an apocalyptic number.

18057164500 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18057164500 is an abundant number, since it is smaller than the sum of its proper divisors (21379683860).

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

18057164500 is a wasteful number, since it uses less digits than its factorization.

18057164500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36114348 (or 36114336 counting only the distinct ones).

The product of its (nonzero) digits is 33600, while the sum is 37.

The spelling of 18057164500 in words is "eighteen billion, fifty-seven million, one hundred sixty-four thousand, five hundred".