21074168 has 16 divisors (see below), whose sum is σ = 39745080. Its totient is φ = 10475488.

The previous prime is 21074153. The next prime is 21074197. The reversal of 21074168 is 86147012.

It is a self number, because there is not a number n which added to its sum of digits gives 21074168.

It is a congruent number.

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, 6230 + ... + 8997.

Almost surely, 2^21074168 is an apocalyptic number.

It is an amenable number.

21074168 is a deficient number, since it is larger than the sum of its proper divisors (18670912).

21074168 is a wasteful number, since it uses less digits than its factorization.

21074168 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15406 (or 15402 counting only the distinct ones).

The product of its (nonzero) digits is 2688, while the sum is 29.

The square root of 21074168 is about 4590.6609545903. The cubic root of 21074168 is about 276.2168358323.

The spelling of 21074168 in words is "twenty-one million, seventy-four thousand, one hundred sixty-eight".