21115095 has 16 divisors (see below), whose sum is σ = 33841152. Its totient is φ = 11242400.

The previous prime is 21115093. The next prime is 21115141. The reversal of 21115095 is 59051112.

It is not a de Polignac number, because 21115095 - 2¹ = 21115093 is a prime.

It is a Smith number, since the sum of its digits (24) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21115091) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 16654 + ... + 17876.

It is an arithmetic number, because the mean of its divisors is an integer number (2115072).

Almost surely, 2^21115095 is an apocalyptic number.

21115095 is a deficient number, since it is larger than the sum of its proper divisors (12726057).

21115095 is a wasteful number, since it uses less digits than its factorization.

21115095 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2382.

The product of its (nonzero) digits is 450, while the sum is 24.

The square root of 21115095 is about 4595.1164294281. The cubic root of 21115095 is about 276.3955287899.

The spelling of 21115095 in words is "twenty-one million, one hundred fifteen thousand, ninety-five".