20679630952 has 16 divisors (see below), whose sum is σ = 38871008100. Its totient is φ = 10314028800.

The previous prime is 20679630941. The next prime is 20679630991. The reversal of 20679630952 is 25903697602.

It can be written as a sum of positive squares in 2 ways, for example, as 13076837316 + 7602793636 = 114354^2 + 87194^2 .

It is a junction number, because it is equal to n+sod(n) for n = 20679630896 and 20679630905.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3219927 + ... + 3226342.

Almost surely, 2^20679630952 is an apocalyptic number.

It is an amenable number.

20679630952 is a deficient number, since it is larger than the sum of its proper divisors (18191377148).

20679630952 is a wasteful number, since it uses less digits than its factorization.

20679630952 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6446676 (or 6446672 counting only the distinct ones).

The product of its (nonzero) digits is 1224720, while the sum is 49.

The spelling of 20679630952 in words is "twenty billion, six hundred seventy-nine million, six hundred thirty thousand, nine hundred fifty-two".