21714863 has 2 divisors, whose sum is σ = 21714864. Its totient is φ = 21714862.

The previous prime is 21714859. The next prime is 21714883. The reversal of 21714863 is 36841712.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21714863 - 2² = 21714859 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21714883) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10857431 + 10857432.

It is an arithmetic number, because the mean of its divisors is an integer number (10857432).

Almost surely, 2^21714863 is an apocalyptic number.

21714863 is a deficient number, since it is larger than the sum of its proper divisors (1).

21714863 is an equidigital number, since it uses as much as digits as its factorization.

21714863 is an evil number, because the sum of its binary digits is even.

The product of its digits is 8064, while the sum is 32.

The square root of 21714863 is about 4659.9209220758. The cubic root of 21714863 is about 278.9881120134.

The spelling of 21714863 in words is "twenty-one million, seven hundred fourteen thousand, eight hundred sixty-three".