21795713 has 2 divisors, whose sum is σ = 21795714. Its totient is φ = 21795712.

The previous prime is 21795707. The next prime is 21795737. The reversal of 21795713 is 31759712.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 11343424 + 10452289 = 3368^2 + 3233^2 .

It is a cyclic number.

It is not a de Polignac number, because 21795713 - 2⁸ = 21795457 is a prime.

It is not a weakly prime, because it can be changed into another prime (21795113) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10897856 + 10897857.

It is an arithmetic number, because the mean of its divisors is an integer number (10897857).

Almost surely, 2^21795713 is an apocalyptic number.

It is an amenable number.

21795713 is a deficient number, since it is larger than the sum of its proper divisors (1).

21795713 is an equidigital number, since it uses as much as digits as its factorization.

21795713 is an evil number, because the sum of its binary digits is even.

The product of its digits is 13230, while the sum is 35.

The square root of 21795713 is about 4668.5879021391. The cubic root of 21795713 is about 279.3339312565. Note that the first 3 decimals are identical.

The spelling of 21795713 in words is "twenty-one million, seven hundred ninety-five thousand, seven hundred thirteen".