21933409792 has 120 divisors (see below), whose sum is σ = 53978725944. Its totient is φ = 8846917632.

The previous prime is 21933409789. The next prime is 21933409807. The reversal of 21933409792 is 29790433912.

It is a Harshad number since it is a multiple of its sum of digits (49).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 400783 + ... + 452209.

Almost surely, 2^21933409792 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 21933409792, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26989362972).

21933409792 is an abundant number, since it is smaller than the sum of its proper divisors (32045316152).

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

21933409792 is an equidigital number, since it uses as much as digits as its factorization.

21933409792 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51476 (or 51453 counting only the distinct ones).

The product of its (nonzero) digits is 734832, while the sum is 49.

The spelling of 21933409792 in words is "twenty-one billion, nine hundred thirty-three million, four hundred nine thousand, seven hundred ninety-two".