18979666524 has 384 divisors, whose sum is σ = 65515806720. Its totient is φ = 4609032192.

The previous prime is 18979666487. The next prime is 18979666549. The reversal of 18979666524 is 42566697981.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 7851364 + ... + 7853780.

It is an arithmetic number, because the mean of its divisors is an integer number (170614080).

Almost surely, 2^18979666524 is an apocalyptic number.

18979666524 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18979666524, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (32757903360).

18979666524 is an abundant number, since it is smaller than the sum of its proper divisors (46536140196).

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

18979666524 is a wasteful number, since it uses less digits than its factorization.

18979666524 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2514 (or 2506 counting only the distinct ones).

The product of its digits is 39191040, while the sum is 63.

The spelling of 18979666524 in words is "eighteen billion, nine hundred seventy-nine million, six hundred sixty-six thousand, five hundred twenty-four".