21113193 has 8 divisors (see below), whose sum is σ = 28177056. Its totient is φ = 14062400.

The previous prime is 21113173. The next prime is 21113221. The reversal of 21113193 is 39131112.

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 21113193 - 2¹⁶ = 21047657 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21113153) 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, 1498 + ... + 6668.

It is an arithmetic number, because the mean of its divisors is an integer number (3522132).

Almost surely, 2^21113193 is an apocalyptic number.

It is an amenable number.

21113193 is a deficient number, since it is larger than the sum of its proper divisors (7063863).

21113193 is a wasteful number, since it uses less digits than its factorization.

21113193 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6535.

The product of its digits is 162, while the sum is 21.

The square root of 21113193 is about 4594.9094659199. The cubic root of 21113193 is about 276.3872295127.

The spelling of 21113193 in words is "twenty-one million, one hundred thirteen thousand, one hundred ninety-three".