18108251916 has 24 divisors (see below), whose sum is σ = 42968735040. Its totient is φ = 5933777232.

The previous prime is 18108251897. The next prime is 18108251927. The reversal of 18108251916 is 61915280181.

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, 12787606 + ... + 12789021.

It is an arithmetic number, because the mean of its divisors is an integer number (1790363960).

Almost surely, 2^18108251916 is an apocalyptic number.

It is an amenable number.

18108251916 is an abundant number, since it is smaller than the sum of its proper divisors (24860483124).

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

18108251916 is a wasteful number, since it uses less digits than its factorization.

18108251916 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25576693 (or 25576691 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 42.

The spelling of 18108251916 in words is "eighteen billion, one hundred eight million, two hundred fifty-one thousand, nine hundred sixteen".