21095835117 has 16 divisors (see below), whose sum is σ = 32153037312. Its totient is φ = 12052136880.

The previous prime is 21095835107. The next prime is 21095835133. The reversal of 21095835117 is 71153859012.

It is not a de Polignac number, because 21095835117 - 2⁶ = 21095835053 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21095835107) 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, 8563 + ... + 205584.

It is an arithmetic number, because the mean of its divisors is an integer number (2009564832).

Almost surely, 2^21095835117 is an apocalyptic number.

It is an amenable number.

21095835117 is a deficient number, since it is larger than the sum of its proper divisors (11057202195).

21095835117 is a wasteful number, since it uses less digits than its factorization.

21095835117 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 218848.

The product of its (nonzero) digits is 75600, while the sum is 42.

The spelling of 21095835117 in words is "twenty-one billion, ninety-five million, eight hundred thirty-five thousand, one hundred seventeen".