20776812 has 24 divisors (see below), whose sum is σ = 55405056. Its totient is φ = 5936208.

The previous prime is 20776807. The next prime is 20776813. The reversal of 20776812 is 21867702.

It is not an unprimeable number, because it can be changed into a prime (20776813) by changing a digit.

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, 123588 + ... + 123755.

It is an arithmetic number, because the mean of its divisors is an integer number (2308544).

Almost surely, 2^20776812 is an apocalyptic number.

It is an amenable number.

20776812 is an abundant number, since it is smaller than the sum of its proper divisors (34628244).

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

20776812 is a wasteful number, since it uses less digits than its factorization.

20776812 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 247357 (or 247355 counting only the distinct ones).

The product of its (nonzero) digits is 9408, while the sum is 33.

The square root of 20776812 is about 4558.1588388296. The cubic root of 20776812 is about 274.9115395917.

The spelling of 20776812 in words is "twenty million, seven hundred seventy-six thousand, eight hundred twelve".