20530513424 has 20 divisors (see below), whose sum is σ = 40007805036. Its totient is φ = 10205918592.

The previous prime is 20530513379. The next prime is 20530513447. The reversal of 20530513424 is 42431503502.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 16527673600 + 4002839824 = 128560^2 + 63268^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3705779 + ... + 3711314.

Almost surely, 2^20530513424 is an apocalyptic number.

It is an amenable number.

20530513424 is a deficient number, since it is larger than the sum of its proper divisors (19477291612).

20530513424 is a wasteful number, since it uses less digits than its factorization.

20530513424 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7417274 (or 7417268 counting only the distinct ones).

The product of its (nonzero) digits is 14400, while the sum is 29.

The spelling of 20530513424 in words is "twenty billion, five hundred thirty million, five hundred thirteen thousand, four hundred twenty-four".