19418199816642 has 16 divisors (see below), whose sum is σ = 42366981418272. Its totient is φ = 5884302974720.

The previous prime is 19418199816607. The next prime is 19418199816643. The reversal of 19418199816642 is 24661899181491.

It is not an unprimeable number, because it can be changed into a prime (19418199816643) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 147107574303 + ... + 147107574434.

It is an arithmetic number, because the mean of its divisors is an integer number (2647936338642).

Almost surely, 2^{19418199816642} is an apocalyptic number.

19418199816642 is an abundant number, since it is smaller than the sum of its proper divisors (22948781601630).

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

19418199816642 is a wasteful number, since it uses less digits than its factorization.

19418199816642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 294215148753.

The product of its digits is 53747712, while the sum is 69.

The spelling of 19418199816642 in words is "nineteen trillion, four hundred eighteen billion, one hundred ninety-nine million, eight hundred sixteen thousand, six hundred forty-two".