20081515257695 has 8 divisors (see below), whose sum is σ = 24125871653520. Its totient is φ = 16046509976640.

The previous prime is 20081515257659. The next prime is 20081515257719. The reversal of 20081515257695 is 59675251518002.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 20081515257695 - 2²⁴ = 20081498480479 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20081515257695.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2337773966 + ... + 2337782555.

It is an arithmetic number, because the mean of its divisors is an integer number (3015733956690).

Almost surely, 2^{20081515257695} is an apocalyptic number.

20081515257695 is a deficient number, since it is larger than the sum of its proper divisors (4044356395825).

20081515257695 is an equidigital number, since it uses as much as digits as its factorization.

20081515257695 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4675557385.

The product of its (nonzero) digits is 7560000, while the sum is 56.

The spelling of 20081515257695 in words is "twenty trillion, eighty-one billion, five hundred fifteen million, two hundred fifty-seven thousand, six hundred ninety-five".