20510564552 has 32 divisors (see below), whose sum is σ = 40138633080. Its totient is φ = 9816368640.

The previous prime is 20510564531. The next prime is 20510564567. The reversal of 20510564552 is 25546501502.

It can be written as a sum of positive squares in 4 ways, for example, as 7634215876 + 12876348676 = 87374^2 + 113474^2 .

It is an unprimeable number.

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 in 7 ways as a sum of consecutive naturals, for example, 572543 + ... + 607310.

Almost surely, 2^20510564552 is an apocalyptic number.

It is an amenable number.

20510564552 is a deficient number, since it is larger than the sum of its proper divisors (19628068528).

20510564552 is a wasteful number, since it uses less digits than its factorization.

20510564552 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1179953 (or 1179949 counting only the distinct ones).

The product of its (nonzero) digits is 60000, while the sum is 35.

The spelling of 20510564552 in words is "twenty billion, five hundred ten million, five hundred sixty-four thousand, five hundred fifty-two".