233320021 has 8 divisors (see below), whose sum is σ = 260450784. Its totient is φ = 207175920.

The previous prime is 233320013. The next prime is 233320033. The reversal of 233320021 is 120023332.

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

It is a cyclic number.

It is not a de Polignac number, because 233320021 - 2³ = 233320013 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 233319977 and 233320004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (233320081) 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, 246166 + ... + 247111.

It is an arithmetic number, because the mean of its divisors is an integer number (32556348).

Almost surely, 2^233320021 is an apocalyptic number.

It is an amenable number.

233320021 is a deficient number, since it is larger than the sum of its proper divisors (27130763).

233320021 is a wasteful number, since it uses less digits than its factorization.

233320021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 493331.

The product of its (nonzero) digits is 216, while the sum is 16.

The square root of 233320021 is about 15274.8165619100. The cubic root of 233320021 is about 615.6265419529.

Adding to 233320021 its reverse (120023332), we get a palindrome (353343353).

The spelling of 233320021 in words is "two hundred thirty-three million, three hundred twenty thousand, twenty-one".