20530579960 has 64 divisors (see below), whose sum is σ = 53045539200. Its totient is φ = 7072732800.

The previous prime is 20530579939. The next prime is 20530580003. The reversal of 20530579960 is 6997503502.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 20530579960.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1219546 + ... + 1236265.

It is an arithmetic number, because the mean of its divisors is an integer number (828836550).

Almost surely, 2^20530579960 is an apocalyptic number.

20530579960 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20530579960 is an abundant number, since it is smaller than the sum of its proper divisors (32514959240).

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

20530579960 is a wasteful number, since it uses less digits than its factorization.

20530579960 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2455852 (or 2455848 counting only the distinct ones).

The product of its (nonzero) digits is 510300, while the sum is 46.

The spelling of 20530579960 in words is "twenty billion, five hundred thirty million, five hundred seventy-nine thousand, nine hundred sixty".