21983452 has 12 divisors (see below), whose sum is σ = 38510080. Its totient is φ = 10980576.

The previous prime is 21983441. The next prime is 21983453. The reversal of 21983452 is 25438912.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21983453) 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, 2968 + ... + 7264.

Almost surely, 2^21983452 is an apocalyptic number.

It is an amenable number.

21983452 is a deficient number, since it is larger than the sum of its proper divisors (16526628).

21983452 is a wasteful number, since it uses less digits than its factorization.

21983452 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5580 (or 5578 counting only the distinct ones).

The product of its digits is 17280, while the sum is 34.

The square root of 21983452 is about 4688.6514052550. The cubic root of 21983452 is about 280.1336606754.

The spelling of 21983452 in words is "twenty-one million, nine hundred eighty-three thousand, four hundred fifty-two".