21460804 has 24 divisors (see below), whose sum is σ = 40812800. Its totient is φ = 9836640.

The previous prime is 21460793. The next prime is 21460843. The reversal of 21460804 is 40806412.

It is a super-2 number, since 2×21460804² = 921132216652832, which contains 22 as substring.

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 7 ways as a sum of consecutive naturals, for example, 2199 + ... + 6910.

Almost surely, 2^21460804 is an apocalyptic number.

It is an amenable number.

21460804 is a deficient number, since it is larger than the sum of its proper divisors (19351996).

21460804 is a wasteful number, since it uses less digits than its factorization.

21460804 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9163 (or 9161 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 25.

The square root of 21460804 is about 4632.5807062587. The cubic root of 21460804 is about 277.8958083057.

The spelling of 21460804 in words is "twenty-one million, four hundred sixty thousand, eight hundred four".