20477048756 has 6 divisors (see below), whose sum is σ = 35834835330. Its totient is φ = 10238524376.

The previous prime is 20477048737. The next prime is 20477048759. The reversal of 20477048756 is 65784077402.

It can be written as a sum of positive squares in only one way, i.e., 10934884900 + 9542163856 = 104570^2 + 97684^2 .

It is a super-2 number, since 2×20477048756² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20477048759) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2559631091 + ... + 2559631098.

It is an arithmetic number, because the mean of its divisors is an integer number (5972472555).

Almost surely, 2^20477048756 is an apocalyptic number.

It is an amenable number.

20477048756 is a deficient number, since it is larger than the sum of its proper divisors (15357786574).

20477048756 is a wasteful number, since it uses less digits than its factorization.

20477048756 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5119262193 (or 5119262191 counting only the distinct ones).

The product of its (nonzero) digits is 2634240, while the sum is 50.

The spelling of 20477048756 in words is "twenty billion, four hundred seventy-seven million, forty-eight thousand, seven hundred fifty-six".