19486743539 has 12 divisors (see below), whose sum is σ = 20575828800. Its totient is φ = 18452610000.

The previous prime is 19486743427. The next prime is 19486743557. The reversal of 19486743539 is 93534768491.

It is a de Polignac number, because none of the positive numbers 2^k-19486743539 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (19486743239) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 854789 + ... + 877289.

It is an arithmetic number, because the mean of its divisors is an integer number (1714652400).

Almost surely, 2^19486743539 is an apocalyptic number.

19486743539 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

19486743539 is a deficient number, since it is larger than the sum of its proper divisors (1089085261).

19486743539 is a wasteful number, since it uses less digits than its factorization.

19486743539 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24938 (or 24919 counting only the distinct ones).

The product of its digits is 19595520, while the sum is 59.

The spelling of 19486743539 in words is "nineteen billion, four hundred eighty-six million, seven hundred forty-three thousand, five hundred thirty-nine".