20031312089 has 2 divisors, whose sum is σ = 20031312090. Its totient is φ = 20031312088.

The previous prime is 20031312083. The next prime is 20031312107. The reversal of 20031312089 is 98021313002.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 10322560000 + 9708752089 = 101600^2 + 98533^2 .

It is a cyclic number.

It is not a de Polignac number, because 20031312089 - 2⁴ = 20031312073 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (20031312083) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10015656044 + 10015656045.

It is an arithmetic number, because the mean of its divisors is an integer number (10015656045).

Almost surely, 2^20031312089 is an apocalyptic number.

It is an amenable number.

20031312089 is a deficient number, since it is larger than the sum of its proper divisors (1).

20031312089 is an equidigital number, since it uses as much as digits as its factorization.

20031312089 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2592, while the sum is 29.

The spelling of 20031312089 in words is "twenty billion, thirty-one million, three hundred twelve thousand, eighty-nine".