21814793 has 64 divisors (see below), whose sum is σ = 32686080. Its totient is φ = 13996800.

The previous prime is 21814777. The next prime is 21814811. The reversal of 21814793 is 39741812.

It is a cyclic number.

It is not a de Polignac number, because 21814793 - 2⁴ = 21814777 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21814703) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 589571 + ... + 589607.

It is an arithmetic number, because the mean of its divisors is an integer number (510720).

Almost surely, 2^21814793 is an apocalyptic number.

It is an amenable number.

21814793 is a deficient number, since it is larger than the sum of its proper divisors (10871287).

21814793 is a wasteful number, since it uses less digits than its factorization.

21814793 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 118.

The product of its digits is 12096, while the sum is 35.

The square root of 21814793 is about 4670.6308995681. The cubic root of 21814793 is about 279.4154172649.

The spelling of 21814793 in words is "twenty-one million, eight hundred fourteen thousand, seven hundred ninety-three".