20472672077 has 12 divisors (see below), whose sum is σ = 24234023100. Its totient is φ = 17179863360.

The previous prime is 20472672041. The next prime is 20472672089. The reversal of 20472672077 is 77027627402.

It can be written as a sum of positive squares in 2 ways, for example, as 3254246116 + 17218425961 = 57046^2 + 131219^2 .

It is not a de Polignac number, because 20472672077 - 2¹⁸ = 20472409933 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20472672037) 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, 6505952 + ... + 6509097.

It is an arithmetic number, because the mean of its divisors is an integer number (2019501925).

Almost surely, 2^20472672077 is an apocalyptic number.

It is an amenable number.

20472672077 is a deficient number, since it is larger than the sum of its proper divisors (3761351023).

20472672077 is a wasteful number, since it uses less digits than its factorization.

20472672077 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13015084 (or 13015073 counting only the distinct ones).

The product of its (nonzero) digits is 460992, while the sum is 44.

The spelling of 20472672077 in words is "twenty billion, four hundred seventy-two million, six hundred seventy-two thousand, seventy-seven".