20033223223261 has 2 divisors, whose sum is σ = 20033223223262. Its totient is φ = 20033223223260.

The previous prime is 20033223223183. The next prime is 20033223223289. The reversal of 20033223223261 is 16232232233002.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 19871035797636 + 162187425625 = 4457694^2 + 402725^2 .

It is a cyclic number.

It is not a de Polignac number, because 20033223223261 - 2⁷ = 20033223223133 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20033223223291) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10016611611630 + 10016611611631.

It is an arithmetic number, because the mean of its divisors is an integer number (10016611611631).

Almost surely, 2^{20033223223261} is an apocalyptic number.

It is an amenable number.

20033223223261 is a deficient number, since it is larger than the sum of its proper divisors (1).

20033223223261 is an equidigital number, since it uses as much as digits as its factorization.

20033223223261 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 31104, while the sum is 31.

Adding to 20033223223261 its reverse (16232232233002), we get a palindrome (36265455456263).

The spelling of 20033223223261 in words is "twenty trillion, thirty-three billion, two hundred twenty-three million, two hundred twenty-three thousand, two hundred sixty-one".