20502406512 has 120 divisors (see below), whose sum is σ = 67690588160. Its totient is φ = 5668859520.

The previous prime is 20502406499. The next prime is 20502406523. The reversal of 20502406512 is 21560420502.

20502406512 is a `hidden beast` number, since 2 + 0 + 5 + 0 + 2 + 4 + 0 + 651 + 2 = 666.

It is a super-2 number, since 2×20502406512² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 296812 + ... + 359307.

Almost surely, 2^20502406512 is an apocalyptic number.

It is an amenable number.

20502406512 is an abundant number, since it is smaller than the sum of its proper divisors (47188181648).

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

20502406512 is a wasteful number, since it uses less digits than its factorization.

20502406512 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 656171 (or 656162 counting only the distinct ones).

The product of its (nonzero) digits is 4800, while the sum is 27.

The spelling of 20502406512 in words is "twenty billion, five hundred two million, four hundred six thousand, five hundred twelve".