20515220610 has 32 divisors (see below), whose sum is σ = 50824806912. Its totient is φ = 5294250240.

The previous prime is 20515220603. The next prime is 20515220647. The reversal of 20515220610 is 1602251502.

It is a happy 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, 11028759 + ... + 11030618.

It is an arithmetic number, because the mean of its divisors is an integer number (1588275216).

Almost surely, 2^20515220610 is an apocalyptic number.

20515220610 is an abundant number, since it is smaller than the sum of its proper divisors (30309586302).

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

20515220610 is a wasteful number, since it uses less digits than its factorization.

20515220610 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22059418.

The product of its (nonzero) digits is 1200, while the sum is 24.

The spelling of 20515220610 in words is "twenty billion, five hundred fifteen million, two hundred twenty thousand, six hundred ten".