21794331 has 8 divisors (see below), whose sum is σ = 31294480. Its totient is φ = 13411872.

The previous prime is 21794299. The next prime is 21794347. The reversal of 21794331 is 13349712.

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

It is not a de Polignac number, because 21794331 - 2⁵ = 21794299 is a prime.

It is a super-2 number, since 2×21794331² = 949985727475122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21794351) 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, 279376 + ... + 279453.

It is an arithmetic number, because the mean of its divisors is an integer number (3911810).

Almost surely, 2^21794331 is an apocalyptic number.

21794331 is a deficient number, since it is larger than the sum of its proper divisors (9500149).

21794331 is a wasteful number, since it uses less digits than its factorization.

21794331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 558845.

The product of its digits is 4536, while the sum is 30.

The square root of 21794331 is about 4668.4398892992. The cubic root of 21794331 is about 279.3280272262.

The spelling of 21794331 in words is "twenty-one million, seven hundred ninety-four thousand, three hundred thirty-one".