20915245677072 has 80 divisors (see below), whose sum is σ = 54918402800832. Its totient is φ = 6857258242560.

The previous prime is 20915245677049. The next prime is 20915245677101. The reversal of 20915245677072 is 27077654251902.

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, 127335703 + ... + 127499849.

Almost surely, 2^{20915245677072} is an apocalyptic number.

It is an amenable number.

20915245677072 is an abundant number, since it is smaller than the sum of its proper divisors (34003157123760).

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

20915245677072 is a wasteful number, since it uses less digits than its factorization.

20915245677072 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 207736 (or 207730 counting only the distinct ones).

The product of its (nonzero) digits is 14817600, while the sum is 57.

The spelling of 20915245677072 in words is "twenty trillion, nine hundred fifteen billion, two hundred forty-five million, six hundred seventy-seven thousand, seventy-two".