20331012233 has 6 divisors (see below), whose sum is σ = 23650361226. Its totient is φ = 17426581872.

The previous prime is 20331012203. The next prime is 20331012239. The reversal of 20331012233 is 33221013302.

It can be written as a sum of positive squares in only one way, i.e., 10698178624 + 9632833609 = 103432^2 + 98147^2 .

It is not a de Polignac number, because 20331012233 - 2¹⁰ = 20331011209 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20331012239) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 207459260 + ... + 207459357.

It is an arithmetic number, because the mean of its divisors is an integer number (3941726871).

Almost surely, 2^20331012233 is an apocalyptic number.

It is an amenable number.

20331012233 is a deficient number, since it is larger than the sum of its proper divisors (3319348993).

20331012233 is an equidigital number, since it uses as much as digits as its factorization.

20331012233 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 414918631 (or 414918624 counting only the distinct ones).

The product of its (nonzero) digits is 648, while the sum is 20.

Adding to 20331012233 its reverse (33221013302), we get a palindrome (53552025535).

The spelling of 20331012233 in words is "twenty billion, three hundred thirty-one million, twelve thousand, two hundred thirty-three".