20303221233 has 32 divisors (see below), whose sum is σ = 28921052160. Its totient is φ = 12644916480.

The previous prime is 20303221219. The next prime is 20303221249. The reversal of 20303221233 is 33212230302.

It is not a de Polignac number, because 20303221233 - 2⁵ = 20303221201 is a prime.

It is a super-2 number, since 2×20303221233² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (20303221333) 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 31 ways as a sum of consecutive naturals, for example, 565216 + ... + 600062.

It is an arithmetic number, because the mean of its divisors is an integer number (903782880).

Almost surely, 2^20303221233 is an apocalyptic number.

It is an amenable number.

20303221233 is a deficient number, since it is larger than the sum of its proper divisors (8617830927).

20303221233 is a wasteful number, since it uses less digits than its factorization.

20303221233 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35097.

The product of its (nonzero) digits is 1296, while the sum is 21.

Adding to 20303221233 its reverse (33212230302), we get a palindrome (53515451535).

The spelling of 20303221233 in words is "twenty billion, three hundred three million, two hundred twenty-one thousand, two hundred thirty-three".