19193144431 has 2 divisors, whose sum is σ = 19193144432. Its totient is φ = 19193144430.

The previous prime is 19193144407. The next prime is 19193144473. The reversal of 19193144431 is 13444139191.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-19193144431 is a prime.

It is a super-2 number, since 2×19193144431² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (19193144401) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9596572215 + 9596572216.

It is an arithmetic number, because the mean of its divisors is an integer number (9596572216).

Almost surely, 2^19193144431 is an apocalyptic number.

19193144431 is a deficient number, since it is larger than the sum of its proper divisors (1).

19193144431 is an equidigital number, since it uses as much as digits as its factorization.

19193144431 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 46656, while the sum is 40.

The spelling of 19193144431 in words is "nineteen billion, one hundred ninety-three million, one hundred forty-four thousand, four hundred thirty-one".