22776728920 has 32 divisors (see below), whose sum is σ = 55906517520. Its totient is φ = 8282446720.

The previous prime is 22776728917. The next prime is 22776728957. The reversal of 22776728920 is 2982767722.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 25882207 + ... + 25883086.

Almost surely, 2^22776728920 is an apocalyptic number.

22776728920 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22776728920 is an abundant number, since it is smaller than the sum of its proper divisors (33129788600).

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

22776728920 is a wasteful number, since it uses less digits than its factorization.

22776728920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51765315 (or 51765311 counting only the distinct ones).

The product of its (nonzero) digits is 2370816, while the sum is 52.

The spelling of 22776728920 in words is "twenty-two billion, seven hundred seventy-six million, seven hundred twenty-eight thousand, nine hundred twenty".