21113343 has 12 divisors (see below), whose sum is σ = 30800328. Its totient is φ = 13935600.

The previous prime is 21113329. The next prime is 21113357. The reversal of 21113343 is 34331112.

It is an interprime number because it is at equal distance from previous prime (21113329) and next prime (21113357).

It is not a de Polignac number, because 21113343 - 2⁸ = 21113087 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21113243) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 10705 + ... + 12522.

It is an arithmetic number, because the mean of its divisors is an integer number (2566694).

Almost surely, 2^21113343 is an apocalyptic number.

21113343 is a deficient number, since it is larger than the sum of its proper divisors (9686985).

21113343 is a wasteful number, since it uses less digits than its factorization.

21113343 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23334 (or 23331 counting only the distinct ones).

The product of its digits is 216, while the sum is 18.

The square root of 21113343 is about 4594.9257883017. The cubic root of 21113343 is about 276.3878840479.

Adding to 21113343 its reverse (34331112), we get a palindrome (55444455).

The spelling of 21113343 in words is "twenty-one million, one hundred thirteen thousand, three hundred forty-three".