21104293 has 8 divisors (see below), whose sum is σ = 25538112. Its totient is φ = 17025216.

The previous prime is 21104287. The next prime is 21104311. The reversal of 21104293 is 39240112.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21104293 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21104203) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 88555 + ... + 88792.

It is an arithmetic number, because the mean of its divisors is an integer number (3192264).

Almost surely, 2^21104293 is an apocalyptic number.

It is an amenable number.

21104293 is a deficient number, since it is larger than the sum of its proper divisors (4433819).

21104293 is a wasteful number, since it uses less digits than its factorization.

21104293 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 177371.

The product of its (nonzero) digits is 432, while the sum is 22.

The square root of 21104293 is about 4593.9409007953. The cubic root of 21104293 is about 276.3483882052.

The spelling of 21104293 in words is "twenty-one million, one hundred four thousand, two hundred ninety-three".