21364592 has 10 divisors (see below), whose sum is σ = 41393928. Its totient is φ = 10682288.

The previous prime is 21364591. The next prime is 21364601. The reversal of 21364592 is 29546312.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21364591) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 667628 + ... + 667659.

Almost surely, 2^21364592 is an apocalyptic number.

It is an amenable number.

21364592 is a deficient number, since it is larger than the sum of its proper divisors (20029336).

21364592 is a wasteful number, since it uses less digits than its factorization.

21364592 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1335295 (or 1335289 counting only the distinct ones).

The product of its digits is 12960, while the sum is 32.

The square root of 21364592 is about 4622.1847648055. The cubic root of 21364592 is about 277.4799033143.

The spelling of 21364592 in words is "twenty-one million, three hundred sixty-four thousand, five hundred ninety-two".