21096113 has 4 divisors (see below), whose sum is σ = 21105648. Its totient is φ = 21086580.

The previous prime is 21096077. The next prime is 21096121. The reversal of 21096113 is 31169012.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 21096113 - 2¹² = 21092017 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21096143) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 470 + ... + 6512.

It is an arithmetic number, because the mean of its divisors is an integer number (5276412).

Almost surely, 2^21096113 is an apocalyptic number.

It is an amenable number.

21096113 is a deficient number, since it is larger than the sum of its proper divisors (9535).

21096113 is an equidigital number, since it uses as much as digits as its factorization.

21096113 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9534.

The product of its (nonzero) digits is 324, while the sum is 23.

The square root of 21096113 is about 4593.0505113704. The cubic root of 21096113 is about 276.3126794841.

The spelling of 21096113 in words is "twenty-one million, ninety-six thousand, one hundred thirteen".