21232332 has 36 divisors (see below), whose sum is σ = 58550856. Its totient is φ = 6433920.

The previous prime is 21232307. The next prime is 21232363. The reversal of 21232332 is 23323212.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a nude number because it is divisible by every one of its digits.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 26413 + ... + 27204.

Almost surely, 2^21232332 is an apocalyptic number.

21232332 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

21232332 is an abundant number, since it is smaller than the sum of its proper divisors (37318524).

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

21232332 is a wasteful number, since it uses less digits than its factorization.

21232332 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53638 (or 53633 counting only the distinct ones).

The product of its digits is 432, while the sum is 18.

The square root of 21232332 is about 4607.8554664833. The cubic root of 21232332 is about 276.9061270965.

Adding to 21232332 its reverse (23323212), we get a palindrome (44555544).

The spelling of 21232332 in words is "twenty-one million, two hundred thirty-two thousand, three hundred thirty-two".