20940005560 has 32 divisors (see below), whose sum is σ = 47123033040. Its totient is φ = 8374576384.

The previous prime is 20940005557. The next prime is 20940005573. The reversal of 20940005560 is 6550004902.

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, 211524 + ... + 294316.

Almost surely, 2^20940005560 is an apocalyptic number.

20940005560 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20940005560 is an abundant number, since it is smaller than the sum of its proper divisors (26183027480).

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

20940005560 is a wasteful number, since it uses less digits than its factorization.

20940005560 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 89127 (or 89123 counting only the distinct ones).

The product of its (nonzero) digits is 10800, while the sum is 31.

The spelling of 20940005560 in words is "twenty billion, nine hundred forty million, five thousand, five hundred sixty".