19138105345 has 8 divisors (see below), whose sum is σ = 22968176040. Its totient is φ = 15308851200.

The previous prime is 19138105339. The next prime is 19138105373. The reversal of 19138105345 is 54350183191.

It can be written as a sum of positive squares in 4 ways, for example, as 6076358401 + 13061746944 = 77951^2 + 114288^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 19138105345 - 2⁵ = 19138105313 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 19138105298 and 19138105307.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 151330 + ... + 247339.

It is an arithmetic number, because the mean of its divisors is an integer number (2871022005).

Almost surely, 2^19138105345 is an apocalyptic number.

It is an amenable number.

19138105345 is a deficient number, since it is larger than the sum of its proper divisors (3830070695).

19138105345 is an equidigital number, since it uses as much as digits as its factorization.

19138105345 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 408275.

The product of its (nonzero) digits is 64800, while the sum is 40.

The spelling of 19138105345 in words is "nineteen billion, one hundred thirty-eight million, one hundred five thousand, three hundred forty-five".