20513564514 has 12 divisors (see below), whose sum is σ = 44446056486. Its totient is φ = 6837854832.

The previous prime is 20513564443. The next prime is 20513564537. The reversal of 20513564514 is 41546531502.

20513564514 is a `hidden beast` number, since 2 + 0 + 5 + 1 + 3 + 5 + 645 + 1 + 4 = 666.

It can be written as a sum of positive squares in only one way, i.e., 11332667025 + 9180897489 = 106455^2 + 95817^2 .

It is a super-3 number, since 3×20513564514³ (a number of 32 digits) contains 333 as substring.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 569821219 + ... + 569821254.

Almost surely, 2^20513564514 is an apocalyptic number.

20513564514 is an abundant number, since it is smaller than the sum of its proper divisors (23932491972).

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

20513564514 is a wasteful number, since it uses less digits than its factorization.

20513564514 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1139642481 (or 1139642478 counting only the distinct ones).

The product of its (nonzero) digits is 72000, while the sum is 36.

The spelling of 20513564514 in words is "twenty billion, five hundred thirteen million, five hundred sixty-four thousand, five hundred fourteen".