21233039 has 8 divisors (see below), whose sum is σ = 21948192. Its totient is φ = 20527360.

The previous prime is 21233029. The next prime is 21233059. The reversal of 21233039 is 93033212.

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-21233039 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21233029) 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, 2342 + ... + 6924.

It is an arithmetic number, because the mean of its divisors is an integer number (2743524).

Almost surely, 2^21233039 is an apocalyptic number.

21233039 is a deficient number, since it is larger than the sum of its proper divisors (715153).

21233039 is a wasteful number, since it uses less digits than its factorization.

21233039 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4737.

The product of its (nonzero) digits is 972, while the sum is 23.

The square root of 21233039 is about 4607.9321826607. The cubic root of 21233039 is about 276.9092005610.

The spelling of 21233039 in words is "twenty-one million, two hundred thirty-three thousand, thirty-nine".