20513515470 has 32 divisors (see below), whose sum is σ = 56265643008. Its totient is φ = 4688803488.

The previous prime is 20513515447. The next prime is 20513515481. The reversal of 20513515470 is 7451531502.

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, 48841494 + ... + 48841913.

It is an arithmetic number, because the mean of its divisors is an integer number (1758301344).

Almost surely, 2^20513515470 is an apocalyptic number.

20513515470 is an abundant number, since it is smaller than the sum of its proper divisors (35752127538).

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

20513515470 is a wasteful number, since it uses less digits than its factorization.

20513515470 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 97683424.

The product of its (nonzero) digits is 21000, while the sum is 33.

The spelling of 20513515470 in words is "twenty billion, five hundred thirteen million, five hundred fifteen thousand, four hundred seventy".