20015255616111 has 12 divisors (see below), whose sum is σ = 33041056890192. Its totient is φ = 11437288923456.

The previous prime is 20015255616107. The next prime is 20015255616131. The reversal of 20015255616111 is 11161655251002.

20015255616111 is a `hidden beast` number, since 2 + 0 + 0 + 1 + 5 + 25 + 5 + 616 + 1 + 11 = 666.

It is not a de Polignac number, because 20015255616111 - 2² = 20015255616107 is a prime.

It is a super-2 number, since 2×20015255616111² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20015255616131) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 158851234986 + ... + 158851235111.

It is an arithmetic number, because the mean of its divisors is an integer number (2753421407516).

Almost surely, 2^{20015255616111} is an apocalyptic number.

20015255616111 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

20015255616111 is a deficient number, since it is larger than the sum of its proper divisors (13025801274081).

20015255616111 is a wasteful number, since it uses less digits than its factorization.

20015255616111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 317702470110 (or 317702470107 counting only the distinct ones).

The product of its (nonzero) digits is 18000, while the sum is 36.

The spelling of 20015255616111 in words is "twenty trillion, fifteen billion, two hundred fifty-five million, six hundred sixteen thousand, one hundred eleven".