18223837272920 has 32 divisors (see below), whose sum is σ = 41046932401200. Its totient is φ = 7281837391488.

The previous prime is 18223837272899. The next prime is 18223837272943. The reversal of 18223837272920 is 2927273832281.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 240509075 + ... + 240584834.

Almost surely, 2^{18223837272920} is an apocalyptic number.

18223837272920 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18223837272920 is an abundant number, since it is smaller than the sum of its proper divisors (22823095128280).

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

18223837272920 is a wasteful number, since it uses less digits than its factorization.

18223837272920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 481094867 (or 481094863 counting only the distinct ones).

The product of its (nonzero) digits is 8128512, while the sum is 56.

The spelling of 18223837272920 in words is "eighteen trillion, two hundred twenty-three billion, eight hundred thirty-seven million, two hundred seventy-two thousand, nine hundred twenty".