21296113 has 4 divisors (see below), whose sum is σ = 21426928. Its totient is φ = 21165300.

The previous prime is 21296111. The next prime is 21296117. The reversal of 21296113 is 31169212.

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.

It is a cyclic number.

It is not a de Polignac number, because 21296113 - 2¹ = 21296111 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21296111) 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, 65163 + ... + 65488.

It is an arithmetic number, because the mean of its divisors is an integer number (5356732).

Almost surely, 2^21296113 is an apocalyptic number.

It is an amenable number.

21296113 is a deficient number, since it is larger than the sum of its proper divisors (130815).

21296113 is a wasteful number, since it uses less digits than its factorization.

21296113 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 130814.

The product of its digits is 648, while the sum is 25.

The square root of 21296113 is about 4614.7711752589. The cubic root of 21296113 is about 277.1831212345.

The spelling of 21296113 in words is "twenty-one million, two hundred ninety-six thousand, one hundred thirteen".