18976524864 has 112 divisors (see below), whose sum is σ = 55226565696. Its totient is φ = 5750384640.

The previous prime is 18976524863. The next prime is 18976524893. The reversal of 18976524864 is 46842567981.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 18976524798 and 18976524807.

It is not an unprimeable number, because it can be changed into a prime (18976524863) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 218424 + ... + 292680.

Almost surely, 2^18976524864 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 18976524864, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27613282848).

18976524864 is an abundant number, since it is smaller than the sum of its proper divisors (36250040832).

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

18976524864 is an equidigital number, since it uses as much as digits as its factorization.

18976524864 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 74305 (or 74273 counting only the distinct ones).

The product of its digits is 23224320, while the sum is 60.

The spelling of 18976524864 in words is "eighteen billion, nine hundred seventy-six million, five hundred twenty-four thousand, eight hundred sixty-four".