21314927 has 2 divisors, whose sum is σ = 21314928. Its totient is φ = 21314926.

The previous prime is 21314893. The next prime is 21314929. The reversal of 21314927 is 72941312.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21314927 - 2²⁴ = 4537711 is a prime.

It is a super-2 number, since 2×21314927² = 908652226030658, which contains 22 as substring.

Together with 21314929, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 21314927.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21314929) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10657463 + 10657464.

It is an arithmetic number, because the mean of its divisors is an integer number (10657464).

Almost surely, 2^21314927 is an apocalyptic number.

21314927 is a deficient number, since it is larger than the sum of its proper divisors (1).

21314927 is an equidigital number, since it uses as much as digits as its factorization.

21314927 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3024, while the sum is 29.

The square root of 21314927 is about 4616.8091795092. The cubic root of 21314927 is about 277.2647227971.

The spelling of 21314927 in words is "twenty-one million, three hundred fourteen thousand, nine hundred twenty-seven".