18908186902 has 16 divisors (see below), whose sum is σ = 31332326400. Its totient is φ = 8485836840.

The previous prime is 18908186833. The next prime is 18908186951. The reversal of 18908186902 is 20968180981.

It is a self number, because there is not a number n which added to its sum of digits gives 18908186902.

It is a congruent number.

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, 5437902 + ... + 5441377.

It is an arithmetic number, because the mean of its divisors is an integer number (1958270400).

Almost surely, 2^18908186902 is an apocalyptic number.

18908186902 is a deficient number, since it is larger than the sum of its proper divisors (12424139498).

18908186902 is a wasteful number, since it uses less digits than its factorization.

18908186902 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10879371.

The product of its (nonzero) digits is 497664, while the sum is 52.

The spelling of 18908186902 in words is "eighteen billion, nine hundred eight million, one hundred eighty-six thousand, nine hundred two".