20500018552 has 32 divisors (see below), whose sum is σ = 41483005200. Its totient is φ = 9441264384.

The previous prime is 20500018549. The next prime is 20500018579. The reversal of 20500018552 is 25581000502.

It is a self number, because there is not a number n which added to its sum of digits gives 20500018552.

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 7 ways as a sum of consecutive naturals, for example, 162477 + ... + 259612.

Almost surely, 2^20500018552 is an apocalyptic number.

It is an amenable number.

20500018552 is an abundant number, since it is smaller than the sum of its proper divisors (20982986648).

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

20500018552 is a wasteful number, since it uses less digits than its factorization.

20500018552 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 422575 (or 422571 counting only the distinct ones).

The product of its (nonzero) digits is 4000, while the sum is 28.

The spelling of 20500018552 in words is "twenty billion, five hundred million, eighteen thousand, five hundred fifty-two".