21197795 has 8 divisors (see below), whose sum is σ = 25817424. Its totient is φ = 16704864.

The previous prime is 21197773. The next prime is 21197821. The reversal of 21197795 is 59779112.

It is a happy number.

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 21197795 - 2⁶ = 21197731 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, 31304 + ... + 31973.

It is an arithmetic number, because the mean of its divisors is an integer number (3227178).

Almost surely, 2^21197795 is an apocalyptic number.

21197795 is a deficient number, since it is larger than the sum of its proper divisors (4619629).

21197795 is an equidigital number, since it uses as much as digits as its factorization.

21197795 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63349.

The product of its digits is 39690, while the sum is 41.

The square root of 21197795 is about 4604.1063193632. The cubic root of 21197795 is about 276.7559049885.

The spelling of 21197795 in words is "twenty-one million, one hundred ninety-seven thousand, seven hundred ninety-five".