21190115096685 has 64 divisors (see below), whose sum is σ = 39828704947200. Its totient is φ = 10659418606656.

The previous prime is 21190115096681. The next prime is 21190115096687. The reversal of 21190115096685 is 58669051109112.

It is a happy number.

21190115096685 is a `hidden beast` number, since 2 + 119 + 0 + 11 + 509 + 6 + 6 + 8 + 5 = 666.

It is not a de Polignac number, because 21190115096685 - 2² = 21190115096681 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21190115096681) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 17614339 + ... + 18778848.

It is an arithmetic number, because the mean of its divisors is an integer number (622323514800).

Almost surely, 2^{21190115096685} is an apocalyptic number.

It is an amenable number.

21190115096685 is a deficient number, since it is larger than the sum of its proper divisors (18638589850515).

21190115096685 is a wasteful number, since it uses less digits than its factorization.

21190115096685 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36393447 (or 36393441 counting only the distinct ones).

The product of its (nonzero) digits is 1166400, while the sum is 54.

The spelling of 21190115096685 in words is "twenty-one trillion, one hundred ninety billion, one hundred fifteen million, ninety-six thousand, six hundred eighty-five".