19943081234 has 16 divisors (see below), whose sum is σ = 30429928800. Its totient is φ = 9799863744.

The previous prime is 19943081233. The next prime is 19943081237. The reversal of 19943081234 is 43218034991.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (19943081233) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 454202 + ... + 496170.

It is an arithmetic number, because the mean of its divisors is an integer number (1901870550).

Almost surely, 2^19943081234 is an apocalyptic number.

19943081234 is a deficient number, since it is larger than the sum of its proper divisors (10486847566).

19943081234 is a wasteful number, since it uses less digits than its factorization.

19943081234 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46057.

The product of its (nonzero) digits is 186624, while the sum is 44.

The spelling of 19943081234 in words is "nineteen billion, nine hundred forty-three million, eighty-one thousand, two hundred thirty-four".