21314743 has 2 divisors, whose sum is σ = 21314744. Its totient is φ = 21314742.

The previous prime is 21314731. The next prime is 21314749. The reversal of 21314743 is 34741312.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21314743 - 2⁹ = 21314231 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21314749) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10657371 + 10657372.

It is an arithmetic number, because the mean of its divisors is an integer number (10657372).

Almost surely, 2^21314743 is an apocalyptic number.

21314743 is a deficient number, since it is larger than the sum of its proper divisors (1).

21314743 is an equidigital number, since it uses as much as digits as its factorization.

21314743 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2016, while the sum is 25.

The square root of 21314743 is about 4616.7892522835. The cubic root of 21314743 is about 277.2639249704.

The spelling of 21314743 in words is "twenty-one million, three hundred fourteen thousand, seven hundred forty-three".