20686683101615 has 32 divisors (see below), whose sum is σ = 25429305888000. Its totient is φ = 16149950235648.

The previous prime is 20686683101551. The next prime is 20686683101639. The reversal of 20686683101615 is 51610138668602.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 20686683101615 - 2⁶ = 20686683101551 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 436966616 + ... + 437013954.

It is an arithmetic number, because the mean of its divisors is an integer number (794665809000).

Almost surely, 2^{20686683101615} is an apocalyptic number.

20686683101615 is a deficient number, since it is larger than the sum of its proper divisors (4742622786385).

20686683101615 is a wasteful number, since it uses less digits than its factorization.

20686683101615 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 58199.

The product of its (nonzero) digits is 2488320, while the sum is 53.

The spelling of 20686683101615 in words is "twenty trillion, six hundred eighty-six billion, six hundred eighty-three million, one hundred one thousand, six hundred fifteen".