18056900 has 18 divisors (see below), whose sum is σ = 39183690. Its totient is φ = 7222720.

The previous prime is 18056869. The next prime is 18056903. The reversal of 18056900 is 965081.

It can be written as a sum of positive squares in 3 ways, for example, as 2815684 + 15241216 = 1678^2 + 3904^2 .

It is a super-2 number, since 2×18056900² = 652103275220000, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (18056903) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 90185 + ... + 90384.

Almost surely, 2^18056900 is an apocalyptic number.

18056900 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18056900 is an abundant number, since it is smaller than the sum of its proper divisors (21126790).

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

18056900 is a wasteful number, since it uses less digits than its factorization.

18056900 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 180583 (or 180576 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 29.

The square root of 18056900 is about 4249.3411253981. The cubic root of 18056900 is about 262.3499974435.

The spelling of 18056900 in words is "eighteen million, fifty-six thousand, nine hundred".