18285171768 has 32 divisors (see below), whose sum is σ = 50792144400. Its totient is φ = 6095057184.

The previous prime is 18285171731. The next prime is 18285171811. The reversal of 18285171768 is 86717158281.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 42326571 + ... + 42327002.

Almost surely, 2^18285171768 is an apocalyptic number.

18285171768 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

18285171768 is an abundant number, since it is smaller than the sum of its proper divisors (32506972632).

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

18285171768 is a wasteful number, since it uses less digits than its factorization.

18285171768 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 84653588 (or 84653578 counting only the distinct ones).

The product of its digits is 1505280, while the sum is 54.

The spelling of 18285171768 in words is "eighteen billion, two hundred eighty-five million, one hundred seventy-one thousand, seven hundred sixty-eight".