18797792920 has 16 divisors (see below), whose sum is σ = 42295034160. Its totient is φ = 7519117152.

The previous prime is 18797792911. The next prime is 18797792921. The reversal of 18797792920 is 2929779781.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18797792921) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 234972372 + ... + 234972451.

It is an arithmetic number, because the mean of its divisors is an integer number (2643439635).

Almost surely, 2^18797792920 is an apocalyptic number.

18797792920 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18797792920 is an abundant number, since it is smaller than the sum of its proper divisors (23497241240).

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

18797792920 is a wasteful number, since it uses less digits than its factorization.

18797792920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 469944834 (or 469944830 counting only the distinct ones).

The product of its (nonzero) digits is 8001504, while the sum is 61.

The spelling of 18797792920 in words is "eighteen billion, seven hundred ninety-seven million, seven hundred ninety-two thousand, nine hundred twenty".