21338843 has 8 divisors (see below), whose sum is σ = 22579920. Its totient is φ = 20109600.

The previous prime is 21338833. The next prime is 21338851. The reversal of 21338843 is 34883312.

It is a happy number.

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

It is a de Polignac number, because none of the positive numbers 2^k-21338843 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21338813) 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, 893 + ... + 6593.

It is an arithmetic number, because the mean of its divisors is an integer number (2822490).

Almost surely, 2^21338843 is an apocalyptic number.

21338843 is a deficient number, since it is larger than the sum of its proper divisors (1241077).

21338843 is a wasteful number, since it uses less digits than its factorization.

21338843 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5917.

The product of its digits is 13824, while the sum is 32.

The square root of 21338843 is about 4619.3985539245. The cubic root of 21338843 is about 277.3683838695.

The spelling of 21338843 in words is "twenty-one million, three hundred thirty-eight thousand, eight hundred forty-three".