20572340624 has 80 divisors (see below), whose sum is σ = 45354954240. Its totient is φ = 9028342400.

The previous prime is 20572340623. The next prime is 20572340627. The reversal of 20572340624 is 42604327502.

It is not an unprimeable number, because it can be changed into a prime (20572340623) 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, 600929 + ... + 634239.

It is an arithmetic number, because the mean of its divisors is an integer number (566936928).

Almost surely, 2^20572340624 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 20572340624, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22677477120).

20572340624 is an abundant number, since it is smaller than the sum of its proper divisors (24782613616).

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

20572340624 is a wasteful number, since it uses less digits than its factorization.

20572340624 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33381 (or 33353 counting only the distinct ones).

The product of its (nonzero) digits is 80640, while the sum is 35.

The spelling of 20572340624 in words is "twenty billion, five hundred seventy-two million, three hundred forty thousand, six hundred twenty-four".