18390844045632 has 56 divisors (see below), whose sum is σ = 48672828390496. Its totient is φ = 6128552821248.

The previous prime is 18390844045601. The next prime is 18390844045687. The reversal of 18390844045632 is 23654044809381.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12821323 + ... + 14183370.

Almost surely, 2^{18390844045632} is an apocalyptic number.

18390844045632 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

18390844045632 is an abundant number, since it is smaller than the sum of its proper divisors (30281984344864).

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

18390844045632 is a wasteful number, since it uses less digits than its factorization.

18390844045632 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27008255 (or 27008245 counting only the distinct ones).

The product of its (nonzero) digits is 19906560, while the sum is 57.

The spelling of 18390844045632 in words is "eighteen trillion, three hundred ninety billion, eight hundred forty-four million, forty-five thousand, six hundred thirty-two".