20116755475505 has 16 divisors (see below), whose sum is σ = 26127676243200. Its totient is φ = 14780799684288.

The previous prime is 20116755475501. The next prime is 20116755475513. The reversal of 20116755475505 is 50557455761102.

It is a cyclic number.

It is not a de Polignac number, because 20116755475505 - 2² = 20116755475501 is a prime.

It is a super-2 number, since 2×20116755475505² (a number of 27 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (20116755475501) 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, 777596477 + ... + 777622346.

It is an arithmetic number, because the mean of its divisors is an integer number (1632979765200).

Almost surely, 2^{20116755475505} is an apocalyptic number.

It is an amenable number.

20116755475505 is a deficient number, since it is larger than the sum of its proper divisors (6010920767695).

20116755475505 is a wasteful number, since it uses less digits than its factorization.

20116755475505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1555219040.

The product of its (nonzero) digits is 7350000, while the sum is 53.

The spelling of 20116755475505 in words is "twenty trillion, one hundred sixteen billion, seven hundred fifty-five million, four hundred seventy-five thousand, five hundred five".