20613543613015 has 64 divisors (see below), whose sum is σ = 25936992571392. Its totient is φ = 15713976960000.

The previous prime is 20613543612971. The next prime is 20613543613027. The reversal of 20613543613015 is 51031634531602.

It is not a de Polignac number, because 20613543613015 - 2²⁷ = 20613409395287 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 768775749 + ... + 768802561.

It is an arithmetic number, because the mean of its divisors is an integer number (405265508928).

Almost surely, 2^{20613543613015} is an apocalyptic number.

20613543613015 is a deficient number, since it is larger than the sum of its proper divisors (5323448958377).

20613543613015 is a wasteful number, since it uses less digits than its factorization.

20613543613015 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27400.

The product of its (nonzero) digits is 194400, while the sum is 40.

The spelling of 20613543613015 in words is "twenty trillion, six hundred thirteen billion, five hundred forty-three million, six hundred thirteen thousand, fifteen".