21695795 has 16 divisors (see below), whose sum is σ = 28540512. Its totient is φ = 15701760.

The previous prime is 21695783. The next prime is 21695813. The reversal of 21695795 is 59759612.

It is a happy number.

It is a de Polignac number, because none of the positive numbers 2^k-21695795 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11969 + ... + 13661.

It is an arithmetic number, because the mean of its divisors is an integer number (1783782).

Almost surely, 2^21695795 is an apocalyptic number.

21695795 is a deficient number, since it is larger than the sum of its proper divisors (6844717).

21695795 is a wasteful number, since it uses less digits than its factorization.

21695795 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1942.

The product of its digits is 170100, while the sum is 44.

The square root of 21695795 is about 4657.8745152698. The cubic root of 21695795 is about 278.9064275134.

The spelling of 21695795 in words is "twenty-one million, six hundred ninety-five thousand, seven hundred ninety-five".