21452268 has 24 divisors (see below), whose sum is σ = 50391040. Its totient is φ = 7102800.

The previous prime is 21452243. The next prime is 21452269. The reversal of 21452268 is 86225412.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21452269) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4108 + ... + 7731.

Almost surely, 2^21452268 is an apocalyptic number.

It is an amenable number.

21452268 is an abundant number, since it is smaller than the sum of its proper divisors (28938772).

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

21452268 is a wasteful number, since it uses less digits than its factorization.

21452268 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11997 (or 11995 counting only the distinct ones).

The product of its digits is 7680, while the sum is 30.

The square root of 21452268 is about 4631.6593138960. The cubic root of 21452268 is about 277.8589592173.

The spelling of 21452268 in words is "twenty-one million, four hundred fifty-two thousand, two hundred sixty-eight".