18106864768 has 32 divisors (see below), whose sum is σ = 36952091820. Its totient is φ = 8832614400.

The previous prime is 18106864717. The next prime is 18106864807. The reversal of 18106864768 is 86746860181.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 18044011584 + 62853184 = 134328^2 + 7928^2 .

It is a tau number, because it is divible by the number of its divisors (32).

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1719873 + ... + 1730368.

Almost surely, 2^18106864768 is an apocalyptic number.

It is an amenable number.

18106864768 is an abundant number, since it is smaller than the sum of its proper divisors (18845227052).

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

18106864768 is an equidigital number, since it uses as much as digits as its factorization.

18106864768 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3450296 (or 3450284 counting only the distinct ones).

The product of its (nonzero) digits is 3096576, while the sum is 55.

The spelling of 18106864768 in words is "eighteen billion, one hundred six million, eight hundred sixty-four thousand, seven hundred sixty-eight".