20312202133 has 2 divisors, whose sum is σ = 20312202134. Its totient is φ = 20312202132.

The previous prime is 20312202121. The next prime is 20312202139. The reversal of 20312202133 is 33120221302.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 19181696004 + 1130506129 = 138498^2 + 33623^2 .

It is a cyclic number.

It is not a de Polignac number, because 20312202133 - 2⁵ = 20312202101 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20312202133.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20312202139) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10156101066 + 10156101067.

It is an arithmetic number, because the mean of its divisors is an integer number (10156101067).

Almost surely, 2^20312202133 is an apocalyptic number.

It is an amenable number.

20312202133 is a deficient number, since it is larger than the sum of its proper divisors (1).

20312202133 is an equidigital number, since it uses as much as digits as its factorization.

20312202133 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 432, while the sum is 19.

Adding to 20312202133 its reverse (33120221302), we get a palindrome (53432423435).

The spelling of 20312202133 in words is "twenty billion, three hundred twelve million, two hundred two thousand, one hundred thirty-three".