21935232 has 128 divisors (see below), whose sum is σ = 70747200. Its totient is φ = 6635520.

The previous prime is 21935227. The next prime is 21935233. The reversal of 21935232 is 23253912.

It is a tau number, because it is divible by the number of its divisors (128).

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a junction number, because it is equal to n+sod(n) for n = 21935196 and 21935205.

It is not an unprimeable number, because it can be changed into a prime (21935233) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 37728 + ... + 38304.

Almost surely, 2^21935232 is an apocalyptic number.

21935232 is a gapful number since it is divisible by the number (22) 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 21935232, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (35373600).

21935232 is an abundant number, since it is smaller than the sum of its proper divisors (48811968).

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

21935232 is a wasteful number, since it uses less digits than its factorization.

21935232 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 611 (or 593 counting only the distinct ones).

The product of its digits is 3240, while the sum is 27.

The square root of 21935232 is about 4683.5063787722. The cubic root of 21935232 is about 279.9286893231.

The spelling of 21935232 in words is "twenty-one million, nine hundred thirty-five thousand, two hundred thirty-two".