20502018516 has 48 divisors (see below), whose sum is σ = 56435671040. Its totient is φ = 5668760160.

The previous prime is 20502018497. The next prime is 20502018521. The reversal of 20502018516 is 61581020502.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3934036 + ... + 3939243.

Almost surely, 2^20502018516 is an apocalyptic number.

It is an amenable number.

20502018516 is an abundant number, since it is smaller than the sum of its proper divisors (35933652524).

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

20502018516 is a wasteful number, since it uses less digits than its factorization.

20502018516 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7873324 (or 7873322 counting only the distinct ones).

The product of its (nonzero) digits is 4800, while the sum is 30.

The spelling of 20502018516 in words is "twenty billion, five hundred two million, eighteen thousand, five hundred sixteen".