20565542432 has 54 divisors (see below), whose sum is σ = 41056826517. Its totient is φ = 10140400000.

The previous prime is 20565542401. The next prime is 20565542443. The reversal of 20565542432 is 23424556502.

It is a powerful number, because all its prime factors have an exponent greater than 1 and also an Achilles number because it is not a perfect power.

It can be written as a sum of positive squares in 2 ways, for example, as 14274514576 + 6291027856 = 119476^2 + 79316^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=101404.

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, 81934307 + ... + 81934557.

Almost surely, 2^20565542432 is an apocalyptic number.

It is an amenable number.

20565542432 is a deficient number, since it is larger than the sum of its proper divisors (20491284085).

20565542432 is an frugal number, since it uses more digits than its factorization.

20565542432 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 714 (or 354 counting only the distinct ones).

The product of its (nonzero) digits is 288000, while the sum is 38.

The spelling of 20565542432 in words is "twenty billion, five hundred sixty-five million, five hundred forty-two thousand, four hundred thirty-two".