20880560 has 40 divisors (see below), whose sum is σ = 48816816. Its totient is φ = 8305920.

The previous prime is 20880553. The next prime is 20880571. The reversal of 20880560 is 6508802.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (40).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16262 + ... + 17498.

Almost surely, 2^20880560 is an apocalyptic number.

20880560 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20880560 is an abundant number, since it is smaller than the sum of its proper divisors (27936256).

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

20880560 is a wasteful number, since it uses less digits than its factorization.

20880560 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1461 (or 1455 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 29.

The square root of 20880560 is about 4569.5251394428. The cubic root of 20880560 is about 275.3683658533.

The spelling of 20880560 in words is "twenty million, eight hundred eighty thousand, five hundred sixty".