21122833 has 8 divisors (see below), whose sum is σ = 21390336. Its totient is φ = 20857200.

The previous prime is 21122821. The next prime is 21122863. The reversal of 21122833 is 33822112.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21122833 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21122863) 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, 49963 + ... + 50383.

It is an arithmetic number, because the mean of its divisors is an integer number (2673792).

Almost surely, 2^21122833 is an apocalyptic number.

It is an amenable number.

21122833 is a deficient number, since it is larger than the sum of its proper divisors (267503).

21122833 is a wasteful number, since it uses less digits than its factorization.

21122833 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 935.

The product of its digits is 576, while the sum is 22.

The square root of 21122833 is about 4595.9583331445. The cubic root of 21122833 is about 276.4292880096.

Adding to 21122833 its reverse (33822112), we get a palindrome (54944945).

The spelling of 21122833 in words is "twenty-one million, one hundred twenty-two thousand, eight hundred thirty-three".