21233208 has 16 divisors (see below), whose sum is σ = 53083080. Its totient is φ = 7077728.

The previous prime is 21233197. The next prime is 21233213. The reversal of 21233208 is 80233212.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 442335 + ... + 442382.

Almost surely, 2^21233208 is an apocalyptic number.

It is an amenable number.

21233208 is an abundant number, since it is smaller than the sum of its proper divisors (31849872).

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

21233208 is a wasteful number, since it uses less digits than its factorization.

21233208 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 884726 (or 884722 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 21.

The square root of 21233208 is about 4607.9505205677. The cubic root of 21233208 is about 276.9099352263.

The spelling of 21233208 in words is "twenty-one million, two hundred thirty-three thousand, two hundred eight".