19431995959 has 2 divisors, whose sum is σ = 19431995960. Its totient is φ = 19431995958.

The previous prime is 19431995929. The next prime is 19431996029. The reversal of 19431995959 is 95959913491.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 19431995959 - 2⁵ = 19431995927 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 19431995959.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (19431995909) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9715997979 + 9715997980.

It is an arithmetic number, because the mean of its divisors is an integer number (9715997980).

Almost surely, 2^19431995959 is an apocalyptic number.

19431995959 is a deficient number, since it is larger than the sum of its proper divisors (1).

19431995959 is an equidigital number, since it uses as much as digits as its factorization.

19431995959 is an evil number, because the sum of its binary digits is even.

The product of its digits is 17714700, while the sum is 64.

The spelling of 19431995959 in words is "nineteen billion, four hundred thirty-one million, nine hundred ninety-five thousand, nine hundred fifty-nine".