19693194444 has 96 divisors (see below), whose sum is σ = 63654796800. Its totient is φ = 5115113280.

The previous prime is 19693194427. The next prime is 19693194487. The reversal of 19693194444 is 44449139691.

19693194444 is a `hidden beast` number, since 1 + 9 + 6 + 9 + 3 + 194 + 444 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a nude number because it is divisible by every one of its digits.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1175739 + ... + 1192370.

It is an arithmetic number, because the mean of its divisors is an integer number (663070800).

Almost surely, 2^19693194444 is an apocalyptic number.

19693194444 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

19693194444 is an abundant number, since it is smaller than the sum of its proper divisors (43961602356).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

19693194444 is a wasteful number, since it uses less digits than its factorization.

19693194444 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2368140 (or 2368132 counting only the distinct ones).

The product of its digits is 3359232, while the sum is 54.

The spelling of 19693194444 in words is "nineteen billion, six hundred ninety-three million, one hundred ninety-four thousand, four hundred forty-four".