21463672 has 16 divisors (see below), whose sum is σ = 40602240. Its totient is φ = 10636416.

The previous prime is 21463667. The next prime is 21463697. The reversal of 21463672 is 27636412.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10968 + ... + 12775.

It is an arithmetic number, because the mean of its divisors is an integer number (2537640).

Almost surely, 2^21463672 is an apocalyptic number.

It is an amenable number.

21463672 is a deficient number, since it is larger than the sum of its proper divisors (19138568).

21463672 is a wasteful number, since it uses less digits than its factorization.

21463672 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23862 (or 23858 counting only the distinct ones).

The product of its digits is 12096, while the sum is 31.

The square root of 21463672 is about 4632.8902426023. The cubic root of 21463672 is about 277.9081869920.

The spelling of 21463672 in words is "twenty-one million, four hundred sixty-three thousand, six hundred seventy-two".