21367492 has 12 divisors (see below), whose sum is σ = 37478140. Its totient is φ = 10659456.

The previous prime is 21367481. The next prime is 21367501. The reversal of 21367492 is 29476312.

It can be written as a sum of positive squares in 2 ways, for example, as 20214016 + 1153476 = 4496^2 + 1074^2 .

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, 4017 + ... + 7672.

Almost surely, 2^21367492 is an apocalyptic number.

It is an amenable number.

21367492 is a deficient number, since it is larger than the sum of its proper divisors (16110648).

21367492 is a wasteful number, since it uses less digits than its factorization.

21367492 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12150 (or 12148 counting only the distinct ones).

The product of its digits is 18144, while the sum is 34.

The square root of 21367492 is about 4622.4984586260. The cubic root of 21367492 is about 277.4924576583.

The spelling of 21367492 in words is "twenty-one million, three hundred sixty-seven thousand, four hundred ninety-two".