20001213233 has 2 divisors, whose sum is σ = 20001213234. Its totient is φ = 20001213232.

The previous prime is 20001213223. The next prime is 20001213251. The reversal of 20001213233 is 33231210002.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 13443938704 + 6557274529 = 115948^2 + 80977^2 .

It is a cyclic number.

It is not a de Polignac number, because 20001213233 - 2⁴ = 20001213217 is a prime.

It is not a weakly prime, because it can be changed into another prime (20001213223) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10000606616 + 10000606617.

It is an arithmetic number, because the mean of its divisors is an integer number (10000606617).

Almost surely, 2^20001213233 is an apocalyptic number.

It is an amenable number.

20001213233 is a deficient number, since it is larger than the sum of its proper divisors (1).

20001213233 is an equidigital number, since it uses as much as digits as its factorization.

20001213233 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 216, while the sum is 17.

Adding to 20001213233 its reverse (33231210002), we get a palindrome (53232423235).

The spelling of 20001213233 in words is "twenty billion, one million, two hundred thirteen thousand, two hundred thirty-three".