21868295 has 16 divisors (see below), whose sum is σ = 27588000. Its totient is φ = 16619904.

The previous prime is 21868289. The next prime is 21868303. The reversal of 21868295 is 59286812.

It is a cyclic number.

It is not a de Polignac number, because 21868295 - 2⁸ = 21868039 is a prime.

It is a congruent number.

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, 6581 + ... + 9329.

It is an arithmetic number, because the mean of its divisors is an integer number (1724250).

Almost surely, 2^21868295 is an apocalyptic number.

21868295 is a deficient number, since it is larger than the sum of its proper divisors (5719705).

21868295 is a wasteful number, since it uses less digits than its factorization.

21868295 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2834.

The product of its digits is 69120, while the sum is 41.

The square root of 21868295 is about 4676.3548838812. The cubic root of 21868295 is about 279.6436580885.

The spelling of 21868295 in words is "twenty-one million, eight hundred sixty-eight thousand, two hundred ninety-five".