21032448 has 40 divisors (see below), whose sum is σ = 56035848. Its totient is φ = 7010304.

The previous prime is 21032447. The next prime is 21032471. The reversal of 21032448 is 84423012.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21032441) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5311 + ... + 8382.

Almost surely, 2^21032448 is an apocalyptic number.

It is an amenable number.

21032448 is an abundant number, since it is smaller than the sum of its proper divisors (35003400).

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

21032448 is an equidigital number, since it uses as much as digits as its factorization.

21032448 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13714 (or 13698 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 24.

The square root of 21032448 is about 4586.1146954694. The cubic root of 21032448 is about 276.0344422466.

The spelling of 21032448 in words is "twenty-one million, thirty-two thousand, four hundred forty-eight".