20872776 has 32 divisors (see below), whose sum is σ = 54452160. Its totient is φ = 6654912.

The previous prime is 20872771. The next prime is 20872807. The reversal of 20872776 is 67727802.

It is not an unprimeable number, because it can be changed into a prime (20872771) by changing a digit.

It is a nontrivial repunit in base 275.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18355 + ... + 19458.

It is an arithmetic number, because the mean of its divisors is an integer number (1701630).

Almost surely, 2^20872776 is an apocalyptic number.

It is an amenable number.

20872776 is an abundant number, since it is smaller than the sum of its proper divisors (33579384).

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

20872776 is a wasteful number, since it uses less digits than its factorization.

20872776 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37845 (or 37841 counting only the distinct ones).

The product of its (nonzero) digits is 65856, while the sum is 39.

The square root of 20872776 is about 4568.6733304100. The cubic root of 20872776 is about 275.3341436905.

The spelling of 20872776 in words is "twenty million, eight hundred seventy-two thousand, seven hundred seventy-six".