21032032 has 24 divisors (see below), whose sum is σ = 47322576. Its totient is φ = 9013632.

The previous prime is 21032023. The next prime is 21032059. The reversal of 21032032 is 23023012.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 46723 + ... + 47170.

It is an arithmetic number, because the mean of its divisors is an integer number (1971774).

Almost surely, 2^21032032 is an apocalyptic number.

It is an amenable number.

21032032 is an abundant number, since it is smaller than the sum of its proper divisors (26290544).

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

21032032 is an equidigital number, since it uses as much as digits as its factorization.

21032032 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 93910 (or 93902 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 13.

The square root of 21032032 is about 4586.0693409498. The cubic root of 21032032 is about 276.0326223430.

Adding to 21032032 its reverse (23023012), we get a palindrome (44055044).

The spelling of 21032032 in words is "twenty-one million, thirty-two thousand, thirty-two".