21468297 has 16 divisors (see below), whose sum is σ = 31050432. Its totient is φ = 13140480.

The previous prime is 21468289. The next prime is 21468353. The reversal of 21468297 is 79286412.

It is not a de Polignac number, because 21468297 - 2³ = 21468289 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21468217) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3043 + ... + 7224.

It is an arithmetic number, because the mean of its divisors is an integer number (1940652).

Almost surely, 2^21468297 is an apocalyptic number.

It is an amenable number.

21468297 is a deficient number, since it is larger than the sum of its proper divisors (9582135).

21468297 is a wasteful number, since it uses less digits than its factorization.

21468297 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10328.

The product of its digits is 48384, while the sum is 39.

The square root of 21468297 is about 4633.3893641696. The cubic root of 21468297 is about 277.9281468115.

The spelling of 21468297 in words is "twenty-one million, four hundred sixty-eight thousand, two hundred ninety-seven".