18077021564 has 48 divisors (see below), whose sum is σ = 37315810560. Its totient is φ = 7502267520.

The previous prime is 18077021563. The next prime is 18077021579. The reversal of 18077021564 is 46512077081.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18077021563) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 29024 + ... + 192344.

It is an arithmetic number, because the mean of its divisors is an integer number (777412720).

Almost surely, 2^18077021564 is an apocalyptic number.

18077021564 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

18077021564 is an abundant number, since it is smaller than the sum of its proper divisors (19238788996).

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

18077021564 is a wasteful number, since it uses less digits than its factorization.

18077021564 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 163458 (or 163456 counting only the distinct ones).

The product of its (nonzero) digits is 94080, while the sum is 41.

The spelling of 18077021564 in words is "eighteen billion, seventy-seven million, twenty-one thousand, five hundred sixty-four".