21115799737182 has 48 divisors (see below), whose sum is σ = 46080117657600. Its totient is φ = 6988103747856.

The previous prime is 21115799737159. The next prime is 21115799737183. The reversal of 21115799737182 is 28173799751112.

21115799737182 is a `hidden beast` number, since 2 + 1 + 11 + 579 + 9 + 7 + 37 + 18 + 2 = 666.

It is a super-2 number, since 2×21115799737182² (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 (21115799737183) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4707598 + ... + 8024529.

It is an arithmetic number, because the mean of its divisors is an integer number (960002451200).

Almost surely, 2^{21115799737182} is an apocalyptic number.

21115799737182 is an abundant number, since it is smaller than the sum of its proper divisors (24964317920418).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21115799737182 is a wasteful number, since it uses less digits than its factorization.

21115799737182 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12732797 (or 12732794 counting only the distinct ones).

The product of its digits is 13335840, while the sum is 63.

The spelling of 21115799737182 in words is "twenty-one trillion, one hundred fifteen billion, seven hundred ninety-nine million, seven hundred thirty-seven thousand, one hundred eighty-two".