19161689050 has 96 divisors (see below), whose sum is σ = 43579889280. Its totient is φ = 6121785600.

The previous prime is 19161689047. The next prime is 19161689083. The reversal of 19161689050 is 5098616191.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 382032 + ... + 429268.

It is an arithmetic number, because the mean of its divisors is an integer number (453957180).

Almost surely, 2^19161689050 is an apocalyptic number.

19161689050 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

19161689050 is an abundant number, since it is smaller than the sum of its proper divisors (24418200230).

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

19161689050 is a wasteful number, since it uses less digits than its factorization.

19161689050 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47336 (or 47331 counting only the distinct ones).

The product of its (nonzero) digits is 116640, while the sum is 46.

The spelling of 19161689050 in words is "nineteen billion, one hundred sixty-one million, six hundred eighty-nine thousand, fifty".