20615120560 has 20 divisors (see below), whose sum is σ = 47930155488. Its totient is φ = 8246048192.

The previous prime is 20615120551. The next prime is 20615120609. The reversal of 20615120560 is 6502151602.

It is a tau number, because it is divible by the number of its divisors (20).

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 128844424 + ... + 128844583.

Almost surely, 2^20615120560 is an apocalyptic number.

20615120560 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20615120560 is an abundant number, since it is smaller than the sum of its proper divisors (27315034928).

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

20615120560 is a wasteful number, since it uses less digits than its factorization.

20615120560 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 257689020 (or 257689014 counting only the distinct ones).

The product of its (nonzero) digits is 3600, while the sum is 28.

The spelling of 20615120560 in words is "twenty billion, six hundred fifteen million, one hundred twenty thousand, five hundred sixty".