21296299 has 4 divisors (see below), whose sum is σ = 21318336. Its totient is φ = 21274264.

The previous prime is 21296281. The next prime is 21296323. The reversal of 21296299 is 99269212.

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 21296299 - 2¹⁷ = 21165227 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21296269) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9499 + ... + 11524.

It is an arithmetic number, because the mean of its divisors is an integer number (5329584).

Almost surely, 2^21296299 is an apocalyptic number.

21296299 is a deficient number, since it is larger than the sum of its proper divisors (22037).

21296299 is a wasteful number, since it uses less digits than its factorization.

21296299 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22036.

The product of its digits is 34992, while the sum is 40.

The square root of 21296299 is about 4614.7913278934. The cubic root of 21296299 is about 277.1839282036.

The spelling of 21296299 in words is "twenty-one million, two hundred ninety-six thousand, two hundred ninety-nine".