18672831422838 has 144 divisors (see below), whose sum is σ = 44660790710640. Its totient is φ = 5838292728000.

The previous prime is 18672831422831. The next prime is 18672831422849. The reversal of 18672831422838 is 83822413827681.

18672831422838 is a `hidden beast` number, since 1 + 8 + 67 + 2 + 8 + 314 + 228 + 38 = 666.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18672831422831) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 24810348 + ... + 25551888.

It is an arithmetic number, because the mean of its divisors is an integer number (310144379935).

Almost surely, 2^{18672831422838} is an apocalyptic number.

18672831422838 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 18672831422838, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22330395355320).

18672831422838 is an abundant number, since it is smaller than the sum of its proper divisors (25987959287802).

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

18672831422838 is an equidigital number, since it uses as much as digits as its factorization.

18672831422838 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 741687 (or 741666 counting only the distinct ones).

The product of its digits is 49545216, while the sum is 63.

The spelling of 18672831422838 in words is "eighteen trillion, six hundred seventy-two billion, eight hundred thirty-one million, four hundred twenty-two thousand, eight hundred thirty-eight".