20001231223333 has 4 divisors (see below), whose sum is σ = 20003604138540. Its totient is φ = 19998858308128.

The previous prime is 20001231223321. The next prime is 20001231223361. The reversal of 20001231223333 is 33332213210002.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 11076236297604 + 8924994925729 = 3328098^2 + 2987473^2 .

It is a cyclic number.

It is not a de Polignac number, because 20001231223333 - 2¹⁷ = 20001231092261 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20001231223298 and 20001231223307.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20001231223033) 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, 1186444960 + ... + 1186461817.

It is an arithmetic number, because the mean of its divisors is an integer number (5000901034635).

Almost surely, 2^{20001231223333} is an apocalyptic number.

It is an amenable number.

20001231223333 is a deficient number, since it is larger than the sum of its proper divisors (2372915207).

20001231223333 is an equidigital number, since it uses as much as digits as its factorization.

20001231223333 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2372915206.

The product of its (nonzero) digits is 3888, while the sum is 25.

Adding to 20001231223333 its reverse (33332213210002), we get a palindrome (53333444433335).

The spelling of 20001231223333 in words is "twenty trillion, one billion, two hundred thirty-one million, two hundred twenty-three thousand, three hundred thirty-three".