18733874920 has 16 divisors (see below), whose sum is σ = 42151218660. Its totient is φ = 7493549952.

The previous prime is 18733874881. The next prime is 18733874933. The reversal of 18733874920 is 2947833781.

It can be written as a sum of positive squares in 2 ways, for example, as 17747035524 + 986839396 = 133218^2 + 31414^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 234173397 + ... + 234173476.

Almost surely, 2^18733874920 is an apocalyptic number.

18733874920 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18733874920 is an abundant number, since it is smaller than the sum of its proper divisors (23417343740).

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

18733874920 is a wasteful number, since it uses less digits than its factorization.

18733874920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 468346884 (or 468346880 counting only the distinct ones).

The product of its (nonzero) digits is 2032128, while the sum is 52.

The spelling of 18733874920 in words is "eighteen billion, seven hundred thirty-three million, eight hundred seventy-four thousand, nine hundred twenty".