21093113 has 8 divisors (see below), whose sum is σ = 21831936. Its totient is φ = 20358000.

The previous prime is 21093103. The next prime is 21093119. The reversal of 21093113 is 31139012.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 21093113 - 2¹⁰ = 21092089 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (21093119) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15563 + ... + 16863.

It is an arithmetic number, because the mean of its divisors is an integer number (2728992).

Almost surely, 2^21093113 is an apocalyptic number.

It is an amenable number.

21093113 is a deficient number, since it is larger than the sum of its proper divisors (738823).

21093113 is a wasteful number, since it uses less digits than its factorization.

21093113 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1855.

The product of its (nonzero) digits is 162, while the sum is 20.

The square root of 21093113 is about 4592.7239194186. The cubic root of 21093113 is about 276.2995810627.

The spelling of 21093113 in words is "twenty-one million, ninety-three thousand, one hundred thirteen".