18894342933 has 20 divisors (see below), whose sum is σ = 29452054368. Its totient is φ = 12048565320.

The previous prime is 18894342913. The next prime is 18894342983. The reversal of 18894342933 is 33924349881.

18894342933 is a `hidden beast` number, since 188 + 9 + 4 + 3 + 429 + 33 = 666.

It is not a de Polignac number, because 18894342933 - 2¹⁶ = 18894277397 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 18894342933.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18894342913) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 5069083 + ... + 5072808.

Almost surely, 2^18894342933 is an apocalyptic number.

It is an amenable number.

18894342933 is a deficient number, since it is larger than the sum of its proper divisors (10557711435).

18894342933 is a wasteful number, since it uses less digits than its factorization.

18894342933 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10141926 (or 10141917 counting only the distinct ones).

The product of its digits is 4478976, while the sum is 54.

The spelling of 18894342933 in words is "eighteen billion, eight hundred ninety-four million, three hundred forty-two thousand, nine hundred thirty-three".