20157752484 has 27 divisors (see below), whose sum is σ = 50956472203. Its totient is φ = 6718966872.

The previous prime is 20157752471. The next prime is 20157752491. The reversal of 20157752484 is 48425775102.

The square root of 20157752484 is 141978.

It is a perfect power (a square), and thus also a powerful number.

20157752484 is a `hidden beast` number, since 20 + 1 + 577 + 52 + 4 + 8 + 4 = 666.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 840037 + ... + 863699.

Almost surely, 2^20157752484 is an apocalyptic number.

20157752484 is the 141978-th square number.

It is an amenable number.

20157752484 is an abundant number, since it is smaller than the sum of its proper divisors (30798719719).

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

20157752484 is an frugal number, since it uses more digits than its factorization.

20157752484 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47336 (or 23668 counting only the distinct ones).

The product of its (nonzero) digits is 627200, while the sum is 45.

It can be divided in two parts, 20157 and 752484, that added together give a square (772641 = 879²).

The spelling of 20157752484 in words is "twenty billion, one hundred fifty-seven million, seven hundred fifty-two thousand, four hundred eighty-four".