19038553994 has 8 divisors (see below), whose sum is σ = 28559901348. Its totient is φ = 9518586880.

The previous prime is 19038553987. The next prime is 19038554009. The reversal of 19038553994 is 49935583091.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 16981477969 + 2057076025 = 130313^2 + 45355^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a Curzon number.

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 3 ways as a sum of consecutive naturals, for example, 309857 + ... + 366180.

Almost surely, 2^19038553994 is an apocalyptic number.

19038553994 is a deficient number, since it is larger than the sum of its proper divisors (9521347354).

19038553994 is a wasteful number, since it uses less digits than its factorization.

19038553994 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 690120.

The product of its (nonzero) digits is 5248800, while the sum is 56.

The spelling of 19038553994 in words is "nineteen billion, thirty-eight million, five hundred fifty-three thousand, nine hundred ninety-four".