20104311233 has 4 divisors (see below), whose sum is σ = 20137763268. Its totient is φ = 20070859200.

The previous prime is 20104311209. The next prime is 20104311259. The reversal of 20104311233 is 33211340102.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 33211340102 = 2 ⋅16605670051.

It can be written as a sum of positive squares in 2 ways, for example, as 18712051264 + 1392259969 = 136792^2 + 37313^2 .

It is a cyclic number.

It is not a de Polignac number, because 20104311233 - 2⁶ = 20104311169 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20104311433) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16725116 + ... + 16726317.

It is an arithmetic number, because the mean of its divisors is an integer number (5034440817).

Almost surely, 2^20104311233 is an apocalyptic number.

It is an amenable number.

20104311233 is a deficient number, since it is larger than the sum of its proper divisors (33452035).

20104311233 is an equidigital number, since it uses as much as digits as its factorization.

20104311233 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33452034.

The product of its (nonzero) digits is 432, while the sum is 20.

Adding to 20104311233 its reverse (33211340102), we get a palindrome (53315651335).

The spelling of 20104311233 in words is "twenty billion, one hundred four million, three hundred eleven thousand, two hundred thirty-three".