21492795 has 16 divisors (see below), whose sum is σ = 34544160. Its totient is φ = 11410944.

The previous prime is 21492791. The next prime is 21492817. The reversal of 21492795 is 59729412.

It is not a de Polignac number, because 21492795 - 2² = 21492791 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21492791) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 307 + ... + 6563.

It is an arithmetic number, because the mean of its divisors is an integer number (2159010).

Almost surely, 2^21492795 is an apocalyptic number.

21492795 is a deficient number, since it is larger than the sum of its proper divisors (13051365).

21492795 is a wasteful number, since it uses less digits than its factorization.

21492795 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6494.

The product of its digits is 45360, while the sum is 39.

The square root of 21492795 is about 4636.0322475151. The cubic root of 21492795 is about 278.0338234988.

The spelling of 21492795 in words is "twenty-one million, four hundred ninety-two thousand, seven hundred ninety-five".