18223267343778 has 48 divisors (see below), whose sum is σ = 45127786055040. Its totient is φ = 5206243387968.

The previous prime is 18223267343773. The next prime is 18223267343789. The reversal of 18223267343778 is 87734376232281.

It is a happy number.

18223267343778 is a `hidden beast` number, since 1 + 8 + 2 + 23 + 267 + 343 + 7 + 7 + 8 = 666.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is not an unprimeable number, because it can be changed into a prime (18223267343773) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3986550 + ... + 7234577.

It is an arithmetic number, because the mean of its divisors is an integer number (940162209480).

Almost surely, 2^{18223267343778} is an apocalyptic number.

18223267343778 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

18223267343778 is an abundant number, since it is smaller than the sum of its proper divisors (26904518711262).

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

18223267343778 is a wasteful number, since it uses less digits than its factorization.

18223267343778 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11234031 (or 11234028 counting only the distinct ones).

The product of its digits is 113799168, while the sum is 63.

The spelling of 18223267343778 in words is "eighteen trillion, two hundred twenty-three billion, two hundred sixty-seven million, three hundred forty-three thousand, seven hundred seventy-eight".