20880580347720 has 48 divisors (see below), whose sum is σ = 67861886131260. Its totient is φ = 5568154759296.

The previous prime is 20880580347719. The next prime is 20880580347827. The reversal of 20880580347720 is 2774308508802.

20880580347720 is a `hidden beast` number, since 2 + 0 + 8 + 8 + 0 + 580 + 34 + 7 + 7 + 20 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 20734489748196 + 146090599524 = 4553514^2 + 382218^2 .

It is a super-2 number, since 2×20880580347720² (a number of 27 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (54) coincides with the sum of the digits of its prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 29000805679 + ... + 29000806398.

Almost surely, 2^{20880580347720} is an apocalyptic number.

20880580347720 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20880580347720 is an abundant number, since it is smaller than the sum of its proper divisors (46981305783540).

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

20880580347720 is a wasteful number, since it uses less digits than its factorization.

20880580347720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 58001612094 (or 58001612087 counting only the distinct ones).

The product of its (nonzero) digits is 6021120, while the sum is 54.

The spelling of 20880580347720 in words is "twenty trillion, eight hundred eighty billion, five hundred eighty million, three hundred forty-seven thousand, seven hundred twenty".