21314807 has 4 divisors (see below), whose sum is σ = 21348600. Its totient is φ = 21281016.

The previous prime is 21314779. The next prime is 21314819. The reversal of 21314807 is 70841312.

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 21314807 - 2⁶ = 21314743 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21314837) 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, 15932 + ... + 17217.

It is an arithmetic number, because the mean of its divisors is an integer number (5337150).

Almost surely, 2^21314807 is an apocalyptic number.

21314807 is a deficient number, since it is larger than the sum of its proper divisors (33793).

21314807 is an equidigital number, since it uses as much as digits as its factorization.

21314807 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33792.

The product of its (nonzero) digits is 1344, while the sum is 26.

The square root of 21314807 is about 4616.7961835021. The cubic root of 21314807 is about 277.2642024758.

The spelling of 21314807 in words is "twenty-one million, three hundred fourteen thousand, eight hundred seven".