20472316677 has 32 divisors (see below), whose sum is σ = 31091760000. Its totient is φ = 13305617280.

The previous prime is 20472316661. The next prime is 20472316679. The reversal of 20472316677 is 77661327402.

20472316677 is a `hidden beast` number, since 20 + 472 + 31 + 66 + 77 = 666.

It is not a de Polignac number, because 20472316677 - 2⁴ = 20472316661 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20472316679) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1708774 + ... + 1720712.

It is an arithmetic number, because the mean of its divisors is an integer number (971617500).

Almost surely, 2^20472316677 is an apocalyptic number.

20472316677 is a gapful number since it is divisible by the number (27) formed by its first and last digit.

It is an amenable number.

20472316677 is a deficient number, since it is larger than the sum of its proper divisors (10619443323).

20472316677 is a wasteful number, since it uses less digits than its factorization.

20472316677 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13538 (or 13532 counting only the distinct ones).

The product of its (nonzero) digits is 592704, while the sum is 45.

The spelling of 20472316677 in words is "twenty billion, four hundred seventy-two million, three hundred sixteen thousand, six hundred seventy-seven".