20505915096 has 32 divisors (see below), whose sum is σ = 51276335040. Its totient is φ = 6833765408.

The previous prime is 20505915071. The next prime is 20505915107. The reversal of 20505915096 is 69051950502.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15175 + ... + 203081.

It is an arithmetic number, because the mean of its divisors is an integer number (1602385470).

Almost surely, 2^20505915096 is an apocalyptic number.

It is an amenable number.

20505915096 is an abundant number, since it is smaller than the sum of its proper divisors (30770419944).

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

20505915096 is a wasteful number, since it uses less digits than its factorization.

20505915096 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 192463 (or 192459 counting only the distinct ones).

The product of its (nonzero) digits is 121500, while the sum is 42.

The spelling of 20505915096 in words is "twenty billion, five hundred five million, nine hundred fifteen thousand, ninety-six".