21715639180011 has 16 divisors (see below), whose sum is σ = 36767219776000. Its totient is φ = 12408936674184.

The previous prime is 21715639179979. The next prime is 21715639180013. The reversal of 21715639180011 is 11008193651712.

21715639180011 is a `hidden beast` number, since 2 + 1 + 7 + 1 + 5 + 639 + 1 + 8 + 0 + 0 + 1 + 1 = 666.

It is not a de Polignac number, because 21715639180011 - 2⁵ = 21715639179979 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21715639180013) 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, 57448780711 + ... + 57448781088.

It is an arithmetic number, because the mean of its divisors is an integer number (2297951236000).

Almost surely, 2^{21715639180011} is an apocalyptic number.

21715639180011 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

21715639180011 is a deficient number, since it is larger than the sum of its proper divisors (15051580595989).

21715639180011 is a wasteful number, since it uses less digits than its factorization.

21715639180011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 114897561815 (or 114897561809 counting only the distinct ones).

The product of its (nonzero) digits is 90720, while the sum is 45.

The spelling of 21715639180011 in words is "twenty-one trillion, seven hundred fifteen billion, six hundred thirty-nine million, one hundred eighty thousand, eleven".