18867601312 has 96 divisors (see below), whose sum is σ = 45598896000. Its totient is φ = 7660445184.

The previous prime is 18867601307. The next prime is 18867601349. The reversal of 18867601312 is 21310676881.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 163308 + ... + 253780.

It is an arithmetic number, because the mean of its divisors is an integer number (474988500).

Almost surely, 2^18867601312 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18867601312, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22799448000).

18867601312 is an abundant number, since it is smaller than the sum of its proper divisors (26731294688).

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

18867601312 is an equidigital number, since it uses as much as digits as its factorization.

18867601312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 90523 (or 90501 counting only the distinct ones).

The product of its (nonzero) digits is 96768, while the sum is 43.

The spelling of 18867601312 in words is "eighteen billion, eight hundred sixty-seven million, six hundred one thousand, three hundred twelve".