20132431309 has 2 divisors, whose sum is σ = 20132431310. Its totient is φ = 20132431308.

The previous prime is 20132431201. The next prime is 20132431313. The reversal of 20132431309 is 90313423102.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 16106148100 + 4026283209 = 126910^2 + 63453^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20132431309 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20132431609) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10066215654 + 10066215655.

It is an arithmetic number, because the mean of its divisors is an integer number (10066215655).

Almost surely, 2^20132431309 is an apocalyptic number.

It is an amenable number.

20132431309 is a deficient number, since it is larger than the sum of its proper divisors (1).

20132431309 is an equidigital number, since it uses as much as digits as its factorization.

20132431309 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3888, while the sum is 28.

The spelling of 20132431309 in words is "twenty billion, one hundred thirty-two million, four hundred thirty-one thousand, three hundred nine".