19112541449 has 4 divisors (see below), whose sum is σ = 19943521536. Its totient is φ = 18281561364.

The previous prime is 19112541407. The next prime is 19112541463. The reversal of 19112541449 is 94414521191.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-19112541449 is a prime.

It is not an unprimeable number, because it can be changed into a prime (19112543449) 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, 415490009 + ... + 415490054.

It is an arithmetic number, because the mean of its divisors is an integer number (4985880384).

Almost surely, 2^19112541449 is an apocalyptic number.

It is an amenable number.

19112541449 is a deficient number, since it is larger than the sum of its proper divisors (830980087).

19112541449 is an equidigital number, since it uses as much as digits as its factorization.

19112541449 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 830980086.

The product of its digits is 51840, while the sum is 41.

The spelling of 19112541449 in words is "nineteen billion, one hundred twelve million, five hundred forty-one thousand, four hundred forty-nine".