18643896228192 has 24 divisors (see below), whose sum is σ = 48940227599256. Its totient is φ = 6214632076032.

The previous prime is 18643896228149. The next prime is 18643896228229. The reversal of 18643896228192 is 29182269834681.

It is a tau number, because it is divible by the number of its divisors (24).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 97103626093 + ... + 97103626284.

It is an arithmetic number, because the mean of its divisors is an integer number (2039176149969).

Almost surely, 2^{18643896228192} is an apocalyptic number.

18643896228192 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

18643896228192 is an abundant number, since it is smaller than the sum of its proper divisors (30296331371064).

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

18643896228192 is a wasteful number, since it uses less digits than its factorization.

18643896228192 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 194207252390 (or 194207252382 counting only the distinct ones).

The product of its digits is 143327232, while the sum is 69.

The spelling of 18643896228192 in words is "eighteen trillion, six hundred forty-three billion, eight hundred ninety-six million, two hundred twenty-eight thousand, one hundred ninety-two".