21303792 has 60 divisors (see below), whose sum is σ = 59934160. Its totient is φ = 7064064.

The previous prime is 21303787. The next prime is 21303797. The reversal of 21303792 is 29730312.

It is an interprime number because it is at equal distance from previous prime (21303787) and next prime (21303797).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21303797) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 48309 + ... + 48747.

Almost surely, 2^21303792 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 21303792, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29967080).

21303792 is an abundant number, since it is smaller than the sum of its proper divisors (38630368).

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

21303792 is a wasteful number, since it uses less digits than its factorization.

21303792 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 790 (or 781 counting only the distinct ones).

The product of its (nonzero) digits is 2268, while the sum is 27.

The square root of 21303792 is about 4615.6031025208. The cubic root of 21303792 is about 277.2164330007.

The spelling of 21303792 in words is "twenty-one million, three hundred three thousand, seven hundred ninety-two".