20652566515 has 16 divisors (see below), whose sum is σ = 29814232320. Its totient is φ = 13416403680.

The previous prime is 20652566507. The next prime is 20652566567. The reversal of 20652566515 is 51566525602.

It is not a de Polignac number, because 20652566515 - 2³ = 20652566507 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 15527581 + ... + 15528910.

It is an arithmetic number, because the mean of its divisors is an integer number (1863389520).

Almost surely, 2^20652566515 is an apocalyptic number.

20652566515 is a deficient number, since it is larger than the sum of its proper divisors (9161665805).

20652566515 is a wasteful number, since it uses less digits than its factorization.

20652566515 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31056522.

The product of its (nonzero) digits is 540000, while the sum is 43.

The spelling of 20652566515 in words is "twenty billion, six hundred fifty-two million, five hundred sixty-six thousand, five hundred fifteen".