18040979756 has 6 divisors (see below), whose sum is σ = 31571714580. Its totient is φ = 9020489876.

The previous prime is 18040979753. The next prime is 18040979783. The reversal of 18040979756 is 65797904081.

It is not an unprimeable number, because it can be changed into a prime (18040979753) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2255122466 + ... + 2255122473.

It is an arithmetic number, because the mean of its divisors is an integer number (5261952430).

Almost surely, 2^18040979756 is an apocalyptic number.

It is an amenable number.

18040979756 is a deficient number, since it is larger than the sum of its proper divisors (13530734824).

18040979756 is a wasteful number, since it uses less digits than its factorization.

18040979756 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4510244943 (or 4510244941 counting only the distinct ones).

The product of its (nonzero) digits is 3810240, while the sum is 56.

The spelling of 18040979756 in words is "eighteen billion, forty million, nine hundred seventy-nine thousand, seven hundred fifty-six".