20677471264 has 12 divisors (see below), whose sum is σ = 40708771614. Its totient is φ = 10338735616.

The previous prime is 20677471261. The next prime is 20677471307. The reversal of 20677471264 is 46217477602.

It can be written as a sum of positive squares in only one way, i.e., 13851406864 + 6826064400 = 117692^2 + 82620^2 .

It is not an unprimeable number, because it can be changed into a prime (20677471261) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 323085457 + ... + 323085520.

Almost surely, 2^20677471264 is an apocalyptic number.

It is an amenable number.

20677471264 is a deficient number, since it is larger than the sum of its proper divisors (20031300350).

20677471264 is an equidigital number, since it uses as much as digits as its factorization.

20677471264 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 646170987 (or 646170979 counting only the distinct ones).

The product of its (nonzero) digits is 790272, while the sum is 46.

The spelling of 20677471264 in words is "twenty billion, six hundred seventy-seven million, four hundred seventy-one thousand, two hundred sixty-four".