21474008 has 16 divisors (see below), whose sum is σ = 40447680. Its totient is φ = 10687968.

The previous prime is 21473987. The next prime is 21474031. The reversal of 21474008 is 80047412.

It is a super-2 number, since 2×21474008² = 922266039168128, which contains 22 as substring.

It is a Smith number, since the sum of its digits (26) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4235 + ... + 7802.

It is an arithmetic number, because the mean of its divisors is an integer number (2527980).

Almost surely, 2^21474008 is an apocalyptic number.

It is an amenable number.

21474008 is a deficient number, since it is larger than the sum of its proper divisors (18973672).

21474008 is a wasteful number, since it uses less digits than its factorization.

21474008 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12266 (or 12262 counting only the distinct ones).

The product of its (nonzero) digits is 1792, while the sum is 26.

The square root of 21474008 is about 4634.0056107001. The cubic root of 21474008 is about 277.9527894573.

The spelling of 21474008 in words is "twenty-one million, four hundred seventy-four thousand, eight".