21325995 has 12 divisors (see below), whose sum is σ = 36965136. Its totient is φ = 11373840.

The previous prime is 21325957. The next prime is 21326017. The reversal of 21325995 is 59952312.

It is a happy number.

It is not a de Polignac number, because 21325995 - 2⁸ = 21325739 is a prime.

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is a plaindrome in base 16.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 236911 + ... + 237000.

It is an arithmetic number, because the mean of its divisors is an integer number (3080428).

Almost surely, 2^21325995 is an apocalyptic number.

21325995 is a deficient number, since it is larger than the sum of its proper divisors (15639141).

21325995 is a wasteful number, since it uses less digits than its factorization.

21325995 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 473922 (or 473919 counting only the distinct ones).

The product of its digits is 24300, while the sum is 36.

The square root of 21325995 is about 4618.0076873041. The cubic root of 21325995 is about 277.3127053673.

The spelling of 21325995 in words is "twenty-one million, three hundred twenty-five thousand, nine hundred ninety-five".