18572871616 has 28 divisors (see below), whose sum is σ = 39690585592. Its totient is φ = 8572094208.

The previous prime is 18572871599. The next prime is 18572871617. The reversal of 18572871616 is 61617827581.

It is a Harshad number since it is a multiple of its sum of digits (52).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18572871617) 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, 11160750 + ... + 11162413.

It is an arithmetic number, because the mean of its divisors is an integer number (1417520914).

Almost surely, 2^18572871616 is an apocalyptic number.

18572871616 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

18572871616 is an abundant number, since it is smaller than the sum of its proper divisors (21117713976).

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

18572871616 is a wasteful number, since it uses less digits than its factorization.

18572871616 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22323188 (or 22323178 counting only the distinct ones).

The product of its digits is 1128960, while the sum is 52.

The spelling of 18572871616 in words is "eighteen billion, five hundred seventy-two million, eight hundred seventy-one thousand, six hundred sixteen".