19491879275 has 18 divisors (see below), whose sum is σ = 26370328932. Its totient is φ = 14174228400.

The previous prime is 19491879259. The next prime is 19491879287. The reversal of 19491879275 is 57297819491.

It is not a de Polignac number, because 19491879275 - 2⁴ = 19491879259 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 2311016 + ... + 2319434.

It is an arithmetic number, because the mean of its divisors is an integer number (1465018274).

Almost surely, 2^19491879275 is an apocalyptic number.

19491879275 is a deficient number, since it is larger than the sum of its proper divisors (6878449657).

19491879275 is an frugal number, since it uses more digits than its factorization.

19491879275 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16859 (or 8435 counting only the distinct ones).

The product of its digits is 11430720, while the sum is 62.

The spelling of 19491879275 in words is "nineteen billion, four hundred ninety-one million, eight hundred seventy-nine thousand, two hundred seventy-five".