19440969187 has 8 divisors (see below), whose sum is σ = 19466092800. Its totient is φ = 19415863944.

The previous prime is 19440969181. The next prime is 19440969203. The reversal of 19440969187 is 78196904491.

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

It is a cyclic number.

It is not a de Polignac number, because 19440969187 - 2³ = 19440969179 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (19440969181) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 4058808 + ... + 4063594.

It is an arithmetic number, because the mean of its divisors is an integer number (2433261600).

Almost surely, 2^19440969187 is an apocalyptic number.

19440969187 is a deficient number, since it is larger than the sum of its proper divisors (25123613).

19440969187 is a wasteful number, since it uses less digits than its factorization.

19440969187 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9185.

The product of its (nonzero) digits is 3919104, while the sum is 58.

The spelling of 19440969187 in words is "nineteen billion, four hundred forty million, nine hundred sixty-nine thousand, one hundred eighty-seven".