18837640900 has 36 divisors (see below), whose sum is σ = 44022120772. Its totient is φ = 6955436160.

The previous prime is 18837640897. The next prime is 18837640957. The reversal of 18837640900 is 904673881.

It is a happy number.

It can be written as a sum of positive squares in 6 ways, for example, as 4889086084 + 13948554816 = 69922^2 + 118104^2 .

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 11 ways as a sum of consecutive naturals, for example, 7243947 + ... + 7246546.

Almost surely, 2^18837640900 is an apocalyptic number.

18837640900 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18837640900 is an abundant number, since it is smaller than the sum of its proper divisors (25184479872).

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

18837640900 is a wasteful number, since it uses less digits than its factorization.

18837640900 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14490520 (or 14490513 counting only the distinct ones).

The product of its (nonzero) digits is 290304, while the sum is 46.

The spelling of 18837640900 in words is "eighteen billion, eight hundred thirty-seven million, six hundred forty thousand, nine hundred".