21490795 has 8 divisors (see below), whose sum is σ = 25820496. Its totient is φ = 17171616.

The previous prime is 21490789. The next prime is 21490867. The reversal of 21490795 is 59709412.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 21490795 - 2⁹ = 21490283 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2944 + ... + 7186.

It is an arithmetic number, because the mean of its divisors is an integer number (3227562).

Almost surely, 2^21490795 is an apocalyptic number.

21490795 is a deficient number, since it is larger than the sum of its proper divisors (4329701).

21490795 is a wasteful number, since it uses less digits than its factorization.

21490795 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5261.

The product of its (nonzero) digits is 22680, while the sum is 37.

The square root of 21490795 is about 4635.8165408049. The cubic root of 21490795 is about 278.0251991374.

The spelling of 21490795 in words is "twenty-one million, four hundred ninety thousand, seven hundred ninety-five".