21867484 has 12 divisors (see below), whose sum is σ = 38307808. Its totient is φ = 10922400.

The previous prime is 21867467. The next prime is 21867487. The reversal of 21867484 is 48476812.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21867487) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2704 + ... + 7144.

Almost surely, 2^21867484 is an apocalyptic number.

It is an amenable number.

21867484 is a deficient number, since it is larger than the sum of its proper divisors (16440324).

21867484 is a wasteful number, since it uses less digits than its factorization.

21867484 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5676 (or 5674 counting only the distinct ones).

The product of its digits is 86016, while the sum is 40.

The square root of 21867484 is about 4676.2681702400. The cubic root of 21867484 is about 279.6402011232.

The spelling of 21867484 in words is "twenty-one million, eight hundred sixty-seven thousand, four hundred eighty-four".