18976215966 has 16 divisors (see below), whose sum is σ = 40184928144. Its totient is φ = 5953322624.

The previous prime is 18976215953. The next prime is 18976215967. The reversal of 18976215966 is 66951267981.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18976215967) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 93020565 + ... + 93020768.

It is an arithmetic number, because the mean of its divisors is an integer number (2511558009).

Almost surely, 2^18976215966 is an apocalyptic number.

18976215966 is an abundant number, since it is smaller than the sum of its proper divisors (21208712178).

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

18976215966 is a wasteful number, since it uses less digits than its factorization.

18976215966 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 186041355.

The product of its digits is 9797760, while the sum is 60.

The spelling of 18976215966 in words is "eighteen billion, nine hundred seventy-six million, two hundred fifteen thousand, nine hundred sixty-six".