20976631228 has 24 divisors (see below), whose sum is σ = 44421102432. Its totient is φ = 8461161984.

The previous prime is 20976631157. The next prime is 20976631229. The reversal of 20976631228 is 82213667902.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20976631229) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 22033801 + ... + 22034752.

It is an arithmetic number, because the mean of its divisors is an integer number (1850879268).

Almost surely, 2^20976631228 is an apocalyptic number.

20976631228 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

20976631228 is an abundant number, since it is smaller than the sum of its proper divisors (23444471204).

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

20976631228 is a wasteful number, since it uses less digits than its factorization.

20976631228 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44068581 (or 44068579 counting only the distinct ones).

The product of its (nonzero) digits is 435456, while the sum is 46.

The spelling of 20976631228 in words is "twenty billion, nine hundred seventy-six million, six hundred thirty-one thousand, two hundred twenty-eight".