21100383792 has 160 divisors (see below), whose sum is σ = 62334581760. Its totient is φ = 6830403840.

The previous prime is 21100383779. The next prime is 21100383851. The reversal of 21100383792 is 29738300112.

It is a super-3 number, since 3×21100383792³ (a number of 32 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2655858 + ... + 2663790.

It is an arithmetic number, because the mean of its divisors is an integer number (389591136).

Almost surely, 2^21100383792 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21100383792, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31167290880).

21100383792 is an abundant number, since it is smaller than the sum of its proper divisors (41234197968).

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

21100383792 is a wasteful number, since it uses less digits than its factorization.

21100383792 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8128 (or 8116 counting only the distinct ones).

The product of its (nonzero) digits is 18144, while the sum is 36.

The spelling of 21100383792 in words is "twenty-one billion, one hundred million, three hundred eighty-three thousand, seven hundred ninety-two".