18396900 has 54 divisors (see below), whose sum is σ = 57666882. Its totient is φ = 4905600.

The previous prime is 18396893. The next prime is 18396947. The reversal of 18396900 is 969381.

It can be written as a sum of positive squares in 3 ways, for example, as 3326976 + 15069924 = 1824^2 + 3882^2 .

It is a super-2 number, since 2×18396900² = 676891859220000, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 9321 + ... + 11120.

Almost surely, 2^18396900 is an apocalyptic number.

18396900 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18396900 is an abundant number, since it is smaller than the sum of its proper divisors (39269982).

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

18396900 is a wasteful number, since it uses less digits than its factorization.

18396900 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20461 (or 20451 counting only the distinct ones).

The product of its (nonzero) digits is 11664, while the sum is 36.

The square root of 18396900 is about 4289.1607570712. The cubic root of 18396900 is about 263.9863973708.

The spelling of 18396900 in words is "eighteen million, three hundred ninety-six thousand, nine hundred".