20472656775 has 12 divisors (see below), whose sum is σ = 33848125992. Its totient is φ = 10918750240.

The previous prime is 20472656717. The next prime is 20472656777. The reversal of 20472656775 is 57765627402.

It is a happy number.

It is not a de Polignac number, because 20472656775 - 2⁷ = 20472656647 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20472656777) by changing a digit.

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 11 ways as a sum of consecutive naturals, for example, 136484304 + ... + 136484453.

It is an arithmetic number, because the mean of its divisors is an integer number (2820677166).

Almost surely, 2^20472656775 is an apocalyptic number.

20472656775 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

20472656775 is a deficient number, since it is larger than the sum of its proper divisors (13375469217).

20472656775 is a wasteful number, since it uses less digits than its factorization.

20472656775 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 272968770 (or 272968765 counting only the distinct ones).

The product of its (nonzero) digits is 4939200, while the sum is 51.

The spelling of 20472656775 in words is "twenty billion, four hundred seventy-two million, six hundred fifty-six thousand, seven hundred seventy-five".