233340021 has 24 divisors (see below), whose sum is σ = 352328704. Its totient is φ = 154314720.

The previous prime is 233340013. The next prime is 233340089. The reversal of 233340021 is 120043332.

It is not a de Polignac number, because 233340021 - 2³ = 233340013 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 233339976 and 233340003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (233340421) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 27081 + ... + 34641.

Almost surely, 2^233340021 is an apocalyptic number.

It is an amenable number.

233340021 is a deficient number, since it is larger than the sum of its proper divisors (118988683).

233340021 is an equidigital number, since it uses as much as digits as its factorization.

233340021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7703 (or 7691 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 18.

The square root of 233340021 is about 15275.4712202275. The cubic root of 233340021 is about 615.6441317837.

Adding to 233340021 its reverse (120043332), we get a palindrome (353383353).

The spelling of 233340021 in words is "two hundred thirty-three million, three hundred forty thousand, twenty-one".