18697912200 has 324 divisors, whose sum is σ = 69257679855. Its totient is φ = 4517356800.

The previous prime is 18697912171. The next prime is 18697912231. The reversal of 18697912200 is 221979681.

It is a powerful number, because all its prime factors have an exponent greater than 1 and also an Achilles number because it is not a perfect power.

It can be written as a sum of positive squares in 5 ways, for example, as 16175261124 + 2522651076 = 127182^2 + 50226^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=96690.

It is a super-2 number, since 2×18697912200² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

It is a polite number, since it can be written in 80 ways as a sum of consecutive naturals, for example, 63815254 + ... + 63815546.

Almost surely, 2^18697912200 is an apocalyptic number.

18697912200 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18697912200

18697912200 is an abundant number, since it is smaller than the sum of its proper divisors (50559767655).

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

18697912200 is a wasteful number, since it uses less digits than its factorization.

18697912200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 630 (or 314 counting only the distinct ones).

The product of its (nonzero) digits is 108864, while the sum is 45.

The spelling of 18697912200 in words is "eighteen billion, six hundred ninety-seven million, nine hundred twelve thousand, two hundred".