20132312197 has 2 divisors, whose sum is σ = 20132312198. Its totient is φ = 20132312196.

The previous prime is 20132312177. The next prime is 20132312219. The reversal of 20132312197 is 79121323102.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 15495519361 + 4636792836 = 124481^2 + 68094^2 .

It is a cyclic number.

It is not a de Polignac number, because 20132312197 - 2⁷ = 20132312069 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20132312117) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10066156098 + 10066156099.

It is an arithmetic number, because the mean of its divisors is an integer number (10066156099).

Almost surely, 2^20132312197 is an apocalyptic number.

It is an amenable number.

20132312197 is a deficient number, since it is larger than the sum of its proper divisors (1).

20132312197 is an equidigital number, since it uses as much as digits as its factorization.

20132312197 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4536, while the sum is 31.

Adding to 20132312197 its reverse (79121323102), we get a palindrome (99253635299).

The spelling of 20132312197 in words is "twenty billion, one hundred thirty-two million, three hundred twelve thousand, one hundred ninety-seven".