21468207 has 24 divisors (see below), whose sum is σ = 30324736. Its totient is φ = 13505184.

The previous prime is 21468197. The next prime is 21468211. The reversal of 21468207 is 70286412.

It is not a de Polignac number, because 21468207 - 2⁸ = 21467951 is a prime.

It is a congruent number.

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 (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 168978 + ... + 169104.

Almost surely, 2^21468207 is an apocalyptic number.

21468207 is a deficient number, since it is larger than the sum of its proper divisors (8856529).

21468207 is a wasteful number, since it uses less digits than its factorization.

21468207 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 255 (or 226 counting only the distinct ones).

The product of its (nonzero) digits is 5376, while the sum is 30.

The square root of 21468207 is about 4633.3796520467. The cubic root of 21468207 is about 277.9277584315.

The spelling of 21468207 in words is "twenty-one million, four hundred sixty-eight thousand, two hundred seven".