21833838 has 24 divisors (see below), whose sum is σ = 50946168. Its totient is φ = 6718032.

The previous prime is 21833821. The next prime is 21833857. The reversal of 21833838 is 83833812.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 46420 + ... + 46887.

It is an arithmetic number, because the mean of its divisors is an integer number (2122757).

Almost surely, 2^21833838 is an apocalyptic number.

21833838 is an abundant number, since it is smaller than the sum of its proper divisors (29112330).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21833838 is a wasteful number, since it uses less digits than its factorization.

21833838 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 93328 (or 93325 counting only the distinct ones).

The product of its digits is 27648, while the sum is 36.

The square root of 21833838 is about 4672.6692585716. The cubic root of 21833838 is about 279.4967064276.

The spelling of 21833838 in words is "twenty-one million, eight hundred thirty-three thousand, eight hundred thirty-eight".