18911979162 has 48 divisors (see below), whose sum is σ = 41335287552. Its totient is φ = 6248904480.

The previous prime is 18911979101. The next prime is 18911979173. The reversal of 18911979162 is 26197911981.

It is a junction number, because it is equal to n+sod(n) for n = 18911979099 and 18911979108.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1210243 + ... + 1225769.

It is an arithmetic number, because the mean of its divisors is an integer number (861151824).

Almost surely, 2^18911979162 is an apocalyptic number.

18911979162 is an abundant number, since it is smaller than the sum of its proper divisors (22423308390).

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

18911979162 is a wasteful number, since it uses less digits than its factorization.

18911979162 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16123 (or 16120 counting only the distinct ones).

The product of its digits is 489888, while the sum is 54.

The spelling of 18911979162 in words is "eighteen billion, nine hundred eleven million, nine hundred seventy-nine thousand, one hundred sixty-two".