20525053556 has 18 divisors (see below), whose sum is σ = 41783145138. Its totient is φ = 8796451440.

The previous prime is 20525053537. The next prime is 20525053603. The reversal of 20525053556 is 65535052502.

It can be written as a sum of positive squares in only one way, i.e., 13945248100 + 6579805456 = 118090^2 + 81116^2 .

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 52359635 + ... + 52360026.

It is an arithmetic number, because the mean of its divisors is an integer number (2321285841).

Almost surely, 2^20525053556 is an apocalyptic number.

It is an amenable number.

20525053556 is an abundant number, since it is smaller than the sum of its proper divisors (21258091582).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20525053556 is a wasteful number, since it uses less digits than its factorization.

20525053556 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 104719679 (or 104719670 counting only the distinct ones).

The product of its (nonzero) digits is 225000, while the sum is 38.

The spelling of 20525053556 in words is "twenty billion, five hundred twenty-five million, fifty-three thousand, five hundred fifty-six".