18374343206823 has 24 divisors (see below), whose sum is σ = 26669753352320. Its totient is φ = 12190021497360.

The previous prime is 18374343206797. The next prime is 18374343206953. The reversal of 18374343206823 is 32860234347381.

18374343206823 is a `hidden beast` number, since 1 + 8 + 3 + 74 + 343 + 206 + 8 + 23 = 666.

It is a de Polignac number, because none of the positive numbers 2^k-18374343206823 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 18374343206823.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18374343206123) 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, 15105948 + ... + 16276926.

Almost surely, 2^{18374343206823} is an apocalyptic number.

18374343206823 is a deficient number, since it is larger than the sum of its proper divisors (8295410145497).

18374343206823 is a wasteful number, since it uses less digits than its factorization.

18374343206823 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1179459 (or 1179456 counting only the distinct ones).

The product of its (nonzero) digits is 13934592, while the sum is 54.

The spelling of 18374343206823 in words is "eighteen trillion, three hundred seventy-four billion, three hundred forty-three million, two hundred six thousand, eight hundred twenty-three".