19774366194 has 32 divisors (see below), whose sum is σ = 43500651840. Its totient is φ = 5992229760.

The previous prime is 19774366193. The next prime is 19774366229. The reversal of 19774366194 is 49166347791.

It is not an unprimeable number, because it can be changed into a prime (19774366193) 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 15 ways as a sum of consecutive naturals, for example, 1230079 + ... + 1246050.

It is an arithmetic number, because the mean of its divisors is an integer number (1359395370).

Almost surely, 2^19774366194 is an apocalyptic number.

19774366194 is an abundant number, since it is smaller than the sum of its proper divisors (23726285646).

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

19774366194 is a wasteful number, since it uses less digits than its factorization.

19774366194 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2476167 (or 2476145 counting only the distinct ones).

The product of its digits is 6858432, while the sum is 57.

The spelling of 19774366194 in words is "nineteen billion, seven hundred seventy-four million, three hundred sixty-six thousand, one hundred ninety-four".