20332312237 has 2 divisors, whose sum is σ = 20332312238. Its totient is φ = 20332312236.

The previous prime is 20332312219. The next prime is 20332312241. The reversal of 20332312237 is 73221323302.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 19257390441 + 1074921796 = 138771^2 + 32786^2 .

It is a cyclic number.

It is not a de Polignac number, because 20332312237 - 2⁷ = 20332312109 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20332312207) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10166156118 + 10166156119.

It is an arithmetic number, because the mean of its divisors is an integer number (10166156119).

Almost surely, 2^20332312237 is an apocalyptic number.

It is an amenable number.

20332312237 is a deficient number, since it is larger than the sum of its proper divisors (1).

20332312237 is an equidigital number, since it uses as much as digits as its factorization.

20332312237 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 9072, while the sum is 28.

Adding to 20332312237 its reverse (73221323302), we get a palindrome (93553635539).

The spelling of 20332312237 in words is "twenty billion, three hundred thirty-two million, three hundred twelve thousand, two hundred thirty-seven".