21392293104 has 360 divisors, whose sum is σ = 76849997952. Its totient is φ = 5640710400.

The previous prime is 21392293067. The next prime is 21392293133. The reversal of 21392293104 is 40139229312.

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

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 4597179 + ... + 4601829.

Almost surely, 2^21392293104 is an apocalyptic number.

21392293104 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21392293104, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (38424998976).

21392293104 is an abundant number, since it is smaller than the sum of its proper divisors (55457704848).

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

21392293104 is a wasteful number, since it uses less digits than its factorization.

21392293104 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4707 (or 4676 counting only the distinct ones).

The product of its (nonzero) digits is 23328, while the sum is 36.

The spelling of 21392293104 in words is "twenty-one billion, three hundred ninety-two million, two hundred ninety-three thousand, one hundred four".