20876560 has 40 divisors (see below), whose sum is σ = 49371840. Its totient is φ = 8207232.

The previous prime is 20876533. The next prime is 20876593. The reversal of 20876560 is 6567802.

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

It is a hoax number, since the sum of its digits (34) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2509 + ... + 6931.

It is an arithmetic number, because the mean of its divisors is an integer number (1234296).

Almost surely, 2^20876560 is an apocalyptic number.

20876560 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20876560, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24685920).

20876560 is an abundant number, since it is smaller than the sum of its proper divisors (28495280).

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

20876560 is a wasteful number, since it uses less digits than its factorization.

20876560 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4495 (or 4489 counting only the distinct ones).

The product of its (nonzero) digits is 20160, while the sum is 34.

The square root of 20876560 is about 4569.0874362393. The cubic root of 20876560 is about 275.3507810151.

The spelling of 20876560 in words is "twenty million, eight hundred seventy-six thousand, five hundred sixty".