21574468 has 12 divisors (see below), whose sum is σ = 38027920. Its totient is φ = 10709352.

The previous prime is 21574459. The next prime is 21574477. The reversal of 21574468 is 86447512.

It is an interprime number because it is at equal distance from previous prime (21574459) and next prime (21574477).

It is a hoax number, since the sum of its digits (37) coincides with the sum of the digits of its distinct prime factors.

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, 18846 + ... + 19957.

Almost surely, 2^21574468 is an apocalyptic number.

It is an amenable number.

21574468 is a deficient number, since it is larger than the sum of its proper divisors (16453452).

21574468 is a wasteful number, since it uses less digits than its factorization.

21574468 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38946 (or 38944 counting only the distinct ones).

The product of its digits is 53760, while the sum is 37.

The square root of 21574468 is about 4644.8323974068. The cubic root of 21574468 is about 278.3855561549.

The spelling of 21574468 in words is "twenty-one million, five hundred seventy-four thousand, four hundred sixty-eight".