20872666560 has 112 divisors (see below), whose sum is σ = 66299559552. Its totient is φ = 5563622400.

The previous prime is 20872666559. The next prime is 20872666561. The reversal of 20872666560 is 6566627802.

It is an interprime number because it is at equal distance from previous prime (20872666559) and next prime (20872666561).

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20872666561) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3770995 + ... + 3776525.

Almost surely, 2^20872666560 is an apocalyptic number.

20872666560 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20872666560 is an abundant number, since it is smaller than the sum of its proper divisors (45426892992).

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

20872666560 is a wasteful number, since it uses less digits than its factorization.

20872666560 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9482 (or 9472 counting only the distinct ones).

The product of its (nonzero) digits is 1451520, while the sum is 48.

The spelling of 20872666560 in words is "twenty billion, eight hundred seventy-two million, six hundred sixty-six thousand, five hundred sixty".