21934752 has 72 divisors (see below), whose sum is σ = 66993696. Its totient is φ = 6265728.

The previous prime is 21934751. The next prime is 21934753. The reversal of 21934752 is 25743912.

It is an interprime number because it is at equal distance from previous prime (21934751) and next prime (21934753).

It is a super-2 number, since 2×21934752² = 962266690603008, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (21934751) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2373 + ... + 7035.

It is an arithmetic number, because the mean of its divisors is an integer number (930468).

Almost surely, 2^21934752 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 21934752, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (33496848).

21934752 is an abundant number, since it is smaller than the sum of its proper divisors (45058944).

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

21934752 is a wasteful number, since it uses less digits than its factorization.

21934752 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4690 (or 4675 counting only the distinct ones).

The product of its digits is 15120, while the sum is 33.

The square root of 21934752 is about 4683.4551348337. The cubic root of 21934752 is about 279.9266474519.

The spelling of 21934752 in words is "twenty-one million, nine hundred thirty-four thousand, seven hundred fifty-two".