21415095 has 24 divisors (see below), whose sum is σ = 39975936. Its totient is φ = 10542528.

The previous prime is 21415081. The next prime is 21415099. The reversal of 21415095 is 59051412.

It is not a de Polignac number, because 21415095 - 2¹⁵ = 21382327 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21415099) 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 23 ways as a sum of consecutive naturals, for example, 17719 + ... + 18888.

It is an arithmetic number, because the mean of its divisors is an integer number (1665664).

Almost surely, 2^21415095 is an apocalyptic number.

21415095 is a deficient number, since it is larger than the sum of its proper divisors (18560841).

21415095 is a wasteful number, since it uses less digits than its factorization.

21415095 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36631 (or 36628 counting only the distinct ones).

The product of its (nonzero) digits is 1800, while the sum is 27.

The square root of 21415095 is about 4627.6446492789. The cubic root of 21415095 is about 277.6983728889.

The spelling of 21415095 in words is "twenty-one million, four hundred fifteen thousand, ninety-five".