21093299 has 8 divisors (see below), whose sum is σ = 21826560. Its totient is φ = 20363400.

The previous prime is 21093283. The next prime is 21093301. The reversal of 21093299 is 99239012.

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

It is a cyclic number.

It is not a de Polignac number, because 21093299 - 2⁴ = 21093283 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21093239) 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, 24722 + ... + 25560.

It is an arithmetic number, because the mean of its divisors is an integer number (2728320).

Almost surely, 2^21093299 is an apocalyptic number.

21093299 is a deficient number, since it is larger than the sum of its proper divisors (733261).

21093299 is an equidigital number, since it uses as much as digits as its factorization.

21093299 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1681.

The product of its (nonzero) digits is 8748, while the sum is 35.

The square root of 21093299 is about 4592.7441687949. The cubic root of 21093299 is about 276.3003932009.

The spelling of 21093299 in words is "twenty-one million, ninety-three thousand, two hundred ninety-nine".