21932432 has 40 divisors (see below), whose sum is σ = 44836416. Its totient is φ = 10372736.

The previous prime is 21932423. The next prime is 21932447. The reversal of 21932432 is 23423912.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 39098 + ... + 39654.

Almost surely, 2^21932432 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 21932432, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22418208).

21932432 is an abundant number, since it is smaller than the sum of its proper divisors (22903984).

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

21932432 is a wasteful number, since it uses less digits than its factorization.

21932432 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 695 (or 689 counting only the distinct ones).

The product of its digits is 2592, while the sum is 26.

The square root of 21932432 is about 4683.2074478930. The cubic root of 21932432 is about 279.9167779882.

The spelling of 21932432 in words is "twenty-one million, nine hundred thirty-two thousand, four hundred thirty-two".