21710492 has 24 divisors (see below), whose sum is σ = 38850000. Its totient is φ = 10613376.

The previous prime is 21710471. The next prime is 21710503. The reversal of 21710492 is 29401712.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 43259 + ... + 43757.

It is an arithmetic number, because the mean of its divisors is an integer number (1618750).

Almost surely, 2^21710492 is an apocalyptic number.

It is an amenable number.

21710492 is a deficient number, since it is larger than the sum of its proper divisors (17139508).

21710492 is a wasteful number, since it uses less digits than its factorization.

21710492 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 725 (or 723 counting only the distinct ones).

The product of its (nonzero) digits is 1008, while the sum is 26.

The square root of 21710492 is about 4659.4518990971. The cubic root of 21710492 is about 278.9693915197.

The spelling of 21710492 in words is "twenty-one million, seven hundred ten thousand, four hundred ninety-two".