19108453827 has 4 divisors (see below), whose sum is σ = 25477938440. Its totient is φ = 12738969216.

The previous prime is 19108453817. The next prime is 19108453831. The reversal of 19108453827 is 72835480191.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 72835480191 = 3 ⋅24278493397.

It is not a de Polignac number, because 19108453827 - 2⁴ = 19108453811 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (19108453817) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3184742302 + ... + 3184742307.

It is an arithmetic number, because the mean of its divisors is an integer number (6369484610).

Almost surely, 2^19108453827 is an apocalyptic number.

19108453827 is a deficient number, since it is larger than the sum of its proper divisors (6369484613).

19108453827 is an equidigital number, since it uses as much as digits as its factorization.

19108453827 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6369484612.

The product of its (nonzero) digits is 483840, while the sum is 48.

The spelling of 19108453827 in words is "nineteen billion, one hundred eight million, four hundred fifty-three thousand, eight hundred twenty-seven".