20015256117737 has 16 divisors (see below), whose sum is σ = 20114249895168. Its totient is φ = 19916540616960.

The previous prime is 20015256117707. The next prime is 20015256117781. The reversal of 20015256117737 is 73771165251002.

It is a cyclic number.

It is not a de Polignac number, because 20015256117737 - 2³² = 20010961150441 is a prime.

It is a super-2 number, since 2×20015256117737² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20015256117691 and 20015256117700.

It is not an unprimeable number, because it can be changed into a prime (20015256117707) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 439361153 + ... + 439406705.

It is an arithmetic number, because the mean of its divisors is an integer number (1257140618448).

Almost surely, 2^{20015256117737} is an apocalyptic number.

It is an amenable number.

20015256117737 is a deficient number, since it is larger than the sum of its proper divisors (98993777431).

20015256117737 is a wasteful number, since it uses less digits than its factorization.

20015256117737 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48560.

The product of its (nonzero) digits is 617400, while the sum is 47.

The spelling of 20015256117737 in words is "twenty trillion, fifteen billion, two hundred fifty-six million, one hundred seventeen thousand, seven hundred thirty-seven".