18516087122 has 8 divisors (see below), whose sum is σ = 29910602316. Its totient is φ = 8545886352.

The previous prime is 18516087097. The next prime is 18516087133. The reversal of 18516087122 is 22178061581.

It can be written as a sum of positive squares in 2 ways, for example, as 18395768161 + 120318961 = 135631^2 + 10969^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a self number, because there is not a number n which added to its sum of digits gives 18516087122.

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, 356078573 + ... + 356078624.

Almost surely, 2^18516087122 is an apocalyptic number.

18516087122 is a deficient number, since it is larger than the sum of its proper divisors (11394515194).

18516087122 is a wasteful number, since it uses less digits than its factorization.

18516087122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 712157212.

The product of its (nonzero) digits is 53760, while the sum is 41.

The spelling of 18516087122 in words is "eighteen billion, five hundred sixteen million, eighty-seven thousand, one hundred twenty-two".