21797095 has 8 divisors (see below), whose sum is σ = 26324064. Its totient is φ = 17325984.

The previous prime is 21797093. The next prime is 21797119. The reversal of 21797095 is 59079712.

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 21797095 - 2¹ = 21797093 is a prime.

It is a super-2 number, since 2×21797095² = 950226700878050, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21797093) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13099 + ... + 14668.

It is an arithmetic number, because the mean of its divisors is an integer number (3290508).

Almost surely, 2^21797095 is an apocalyptic number.

21797095 is a deficient number, since it is larger than the sum of its proper divisors (4526969).

21797095 is a wasteful number, since it uses less digits than its factorization.

21797095 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27929.

The product of its (nonzero) digits is 39690, while the sum is 40.

The square root of 21797095 is about 4668.7359102866. The cubic root of 21797095 is about 279.3398350373.

The spelling of 21797095 in words is "twenty-one million, seven hundred ninety-seven thousand, ninety-five".