20431531607 has 2 divisors, whose sum is σ = 20431531608. Its totient is φ = 20431531606.

The previous prime is 20431531597. The next prime is 20431531639. The reversal of 20431531607 is 70613513402.

It is an a-pointer prime, because the next prime (20431531639) can be obtained adding 20431531607 to its sum of digits (32).

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20431531607 - 2⁴ = 20431531591 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20431531007) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10215765803 + 10215765804.

It is an arithmetic number, because the mean of its divisors is an integer number (10215765804).

Almost surely, 2^20431531607 is an apocalyptic number.

20431531607 is a deficient number, since it is larger than the sum of its proper divisors (1).

20431531607 is an equidigital number, since it uses as much as digits as its factorization.

20431531607 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 15120, while the sum is 32.

The spelling of 20431531607 in words is "twenty billion, four hundred thirty-one million, five hundred thirty-one thousand, six hundred seven".