19145723134 has 16 divisors (see below), whose sum is σ = 28920478608. Its totient is φ = 9505746432.

The previous prime is 19145723111. The next prime is 19145723143. The reversal of 19145723134 is 43132754191.

It is a congruent 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 7 ways as a sum of consecutive naturals, for example, 165804 + ... + 256480.

It is an arithmetic number, because the mean of its divisors is an integer number (1807529913).

Almost surely, 2^19145723134 is an apocalyptic number.

19145723134 is a deficient number, since it is larger than the sum of its proper divisors (9774755474).

19145723134 is a wasteful number, since it uses less digits than its factorization.

19145723134 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 91419.

The product of its digits is 90720, while the sum is 40.

The spelling of 19145723134 in words is "nineteen billion, one hundred forty-five million, seven hundred twenty-three thousand, one hundred thirty-four".