20993272560 has 120 divisors (see below), whose sum is σ = 75925702944. Its totient is φ = 5167572480.

The previous prime is 20993272543. The next prime is 20993272583. The reversal of 20993272560 is 6527239902.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (120).

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1112076 + ... + 1130795.

Almost surely, 2^20993272560 is an apocalyptic number.

20993272560 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20993272560 is an abundant number, since it is smaller than the sum of its proper divisors (54932430384).

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

20993272560 is a wasteful number, since it uses less digits than its factorization.

20993272560 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2242903 (or 2242894 counting only the distinct ones).

The product of its (nonzero) digits is 408240, while the sum is 45.

The spelling of 20993272560 in words is "twenty billion, nine hundred ninety-three million, two hundred seventy-two thousand, five hundred sixty".