21299294 has 16 divisors (see below), whose sum is σ = 33384960. Its totient is φ = 10179480.

The previous prime is 21299281. The next prime is 21299303. The reversal of 21299294 is 49299212.

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, 3077 + ... + 7215.

It is an arithmetic number, because the mean of its divisors is an integer number (2086560).

Almost surely, 2^21299294 is an apocalyptic number.

21299294 is a deficient number, since it is larger than the sum of its proper divisors (12085666).

21299294 is a wasteful number, since it uses less digits than its factorization.

21299294 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4255.

The product of its digits is 23328, while the sum is 38.

The square root of 21299294 is about 4615.1158165316. The cubic root of 21299294 is about 277.1969214933.

The spelling of 21299294 in words is "twenty-one million, two hundred ninety-nine thousand, two hundred ninety-four".