21300299 has 4 divisors (see below), whose sum is σ = 21315600. Its totient is φ = 21285000.

The previous prime is 21300289. The next prime is 21300319. The reversal of 21300299 is 99200312.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 21300299 - 2¹² = 21296203 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21300289) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5327 + ... + 8424.

It is an arithmetic number, because the mean of its divisors is an integer number (5328900).

Almost surely, 2^21300299 is an apocalyptic number.

21300299 is a deficient number, since it is larger than the sum of its proper divisors (15301).

21300299 is a wasteful number, since it uses less digits than its factorization.

21300299 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15300.

The product of its (nonzero) digits is 972, while the sum is 26.

The square root of 21300299 is about 4615.2246965885. The cubic root of 21300299 is about 277.2012812392.

The spelling of 21300299 in words is "twenty-one million, three hundred thousand, two hundred ninety-nine".