20477048769 has 12 divisors (see below), whose sum is σ = 29582022756. Its totient is φ = 13649490432.

The previous prime is 20477048759. The next prime is 20477048789. The reversal of 20477048769 is 96784077402.

It can be written as a sum of positive squares in 2 ways, for example, as 5953665600 + 14523383169 = 77160^2 + 120513^2 .

It is not a de Polignac number, because 20477048769 - 2⁵ = 20477048737 is a prime.

It is a super-2 number, since 2×20477048769² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (20477048759) 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, 85444 + ... + 219669.

It is an arithmetic number, because the mean of its divisors is an integer number (2465168563).

Almost surely, 2^20477048769 is an apocalyptic number.

It is an amenable number.

20477048769 is a deficient number, since it is larger than the sum of its proper divisors (9104973987).

20477048769 is a wasteful number, since it uses less digits than its factorization.

20477048769 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 312576 (or 312573 counting only the distinct ones).

The product of its (nonzero) digits is 4741632, while the sum is 54.

The spelling of 20477048769 in words is "twenty billion, four hundred seventy-seven million, forty-eight thousand, seven hundred sixty-nine".