21023448 has 32 divisors (see below), whose sum is σ = 52681200. Its totient is φ = 6991488.

The previous prime is 21023419. The next prime is 21023459. The reversal of 21023448 is 84432012.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13998 + ... + 15426.

Almost surely, 2^21023448 is an apocalyptic number.

It is an amenable number.

21023448 is an abundant number, since it is smaller than the sum of its proper divisors (31657752).

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

21023448 is a wasteful number, since it uses less digits than its factorization.

21023448 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2051 (or 2047 counting only the distinct ones).

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

The square root of 21023448 is about 4585.1333677441. The cubic root of 21023448 is about 275.9950639739.

The spelling of 21023448 in words is "twenty-one million, twenty-three thousand, four hundred forty-eight".