18279313472 has 56 divisors (see below), whose sum is σ = 41580450240. Its totient is φ = 7810260480.

The previous prime is 18279313469. The next prime is 18279313501. The reversal of 18279313472 is 27431397281.

It is a tau number, because it is divible by the number of its divisors (56).

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, 86654 + ... + 209922.

It is an arithmetic number, because the mean of its divisors is an integer number (742508040).

Almost surely, 2^18279313472 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 18279313472, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (20790225120).

18279313472 is an abundant number, since it is smaller than the sum of its proper divisors (23301136768).

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

18279313472 is a wasteful number, since it uses less digits than its factorization.

18279313472 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 123619 (or 123609 counting only the distinct ones).

The product of its digits is 508032, while the sum is 47.

The spelling of 18279313472 in words is "eighteen billion, two hundred seventy-nine million, three hundred thirteen thousand, four hundred seventy-two".