18207979764 has 96 divisors (see below), whose sum is σ = 47313866880. Its totient is φ = 5414542848.

The previous prime is 18207979753. The next prime is 18207979771. The reversal of 18207979764 is 46797970281.

It is a Smith number, since the sum of its digits (60) coincides with the sum of the digits of its prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 18207979698 and 18207979707.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 537522 + ... + 570390.

It is an arithmetic number, because the mean of its divisors is an integer number (492852780).

Almost surely, 2^18207979764 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18207979764, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23656933440).

18207979764 is an abundant number, since it is smaller than the sum of its proper divisors (29105887116).

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

18207979764 is a wasteful number, since it uses less digits than its factorization.

18207979764 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33009 (or 33007 counting only the distinct ones).

The product of its (nonzero) digits is 10668672, while the sum is 60.

The spelling of 18207979764 in words is "eighteen billion, two hundred seven million, nine hundred seventy-nine thousand, seven hundred sixty-four".