21314901 has 4 divisors (see below), whose sum is σ = 28419872. Its totient is φ = 14209932.

The previous prime is 21314893. The next prime is 21314927. The reversal of 21314901 is 10941312.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 21314901 - 2³ = 21314893 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21314401) 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, 3552481 + ... + 3552486.

It is an arithmetic number, because the mean of its divisors is an integer number (7104968).

Almost surely, 2^21314901 is an apocalyptic number.

It is an amenable number.

21314901 is a deficient number, since it is larger than the sum of its proper divisors (7104971).

21314901 is an equidigital number, since it uses as much as digits as its factorization.

21314901 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7104970.

The product of its (nonzero) digits is 216, while the sum is 21.

The square root of 21314901 is about 4616.8063637107. The cubic root of 21314901 is about 277.2646100610.

The spelling of 21314901 in words is "twenty-one million, three hundred fourteen thousand, nine hundred one".