20928277629 has 12 divisors (see below), whose sum is σ = 34548267936. Its totient is φ = 11959015752.

The previous prime is 20928277627. The next prime is 20928277637. The reversal of 20928277629 is 92677282902.

It is a happy number.

20928277629 is a `hidden beast` number, since 2 + 0 + 9 + 2 + 8 + 2 + 7 + 7 + 629 = 666.

It is not a de Polignac number, because 20928277629 - 2¹ = 20928277627 is a prime.

It is a Smith number, since the sum of its digits (54) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20928277621) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 166097379 + ... + 166097504.

It is an arithmetic number, because the mean of its divisors is an integer number (2879022328).

Almost surely, 2^20928277629 is an apocalyptic number.

It is an amenable number.

20928277629 is a deficient number, since it is larger than the sum of its proper divisors (13619990307).

20928277629 is a wasteful number, since it uses less digits than its factorization.

20928277629 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 332194896 (or 332194893 counting only the distinct ones).

The product of its (nonzero) digits is 3048192, while the sum is 54.

The spelling of 20928277629 in words is "twenty billion, nine hundred twenty-eight million, two hundred seventy-seven thousand, six hundred twenty-nine".