19144743811 has 16 divisors (see below), whose sum is σ = 20328650496. Its totient is φ = 18000000000.

The previous prime is 19144743769. The next prime is 19144743829. The reversal of 19144743811 is 11834744191.

It is a 10-Lehmer number, since φ(19144743811) divides (19144743811-1)¹⁰.

It is a cyclic number.

It is not a de Polignac number, because 19144743811 - 2³³ = 10554809219 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (19144713811) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 275061 + ... + 337561.

It is an arithmetic number, because the mean of its divisors is an integer number (1270540656).

Almost surely, 2^19144743811 is an apocalyptic number.

19144743811 is the 61879-th centered decagonal number.

19144743811 is a deficient number, since it is larger than the sum of its proper divisors (1183906685).

19144743811 is a wasteful number, since it uses less digits than its factorization.

19144743811 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 62814.

The product of its digits is 96768, while the sum is 43.

The spelling of 19144743811 in words is "nineteen billion, one hundred forty-four million, seven hundred forty-three thousand, eight hundred eleven".