19418518361 has 8 divisors (see below), whose sum is σ = 22104874944. Its totient is φ = 16885667920.

The previous prime is 19418518337. The next prime is 19418518363. The reversal of 19418518361 is 16381581491.

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

It is not a de Polignac number, because 19418518361 - 2³⁰ = 18344776537 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (19418518363) 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, 38376266 + ... + 38376771.

It is an arithmetic number, because the mean of its divisors is an integer number (2763109368).

Almost surely, 2^19418518361 is an apocalyptic number.

19418518361 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

19418518361 is a deficient number, since it is larger than the sum of its proper divisors (2686356583).

19418518361 is a wasteful number, since it uses less digits than its factorization.

19418518361 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 76753071.

The product of its digits is 207360, while the sum is 47.

The spelling of 19418518361 in words is "nineteen billion, four hundred eighteen million, five hundred eighteen thousand, three hundred sixty-one".