21916295 has 16 divisors (see below), whose sum is σ = 26998272. Its totient is φ = 17072640.

The previous prime is 21916267. The next prime is 21916313. The reversal of 21916295 is 59261912.

It is not a de Polignac number, because 21916295 - 2⁶ = 21916231 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 50399 + ... + 50831.

It is an arithmetic number, because the mean of its divisors is an integer number (1687392).

Almost surely, 2^21916295 is an apocalyptic number.

21916295 is a deficient number, since it is larger than the sum of its proper divisors (5081977).

21916295 is a wasteful number, since it uses less digits than its factorization.

21916295 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 682.

The product of its digits is 9720, while the sum is 35.

The square root of 21916295 is about 4681.4842731766. The cubic root of 21916295 is about 279.8481106479.

The spelling of 21916295 in words is "twenty-one million, nine hundred sixteen thousand, two hundred ninety-five".