18700001838 has 24 divisors (see below), whose sum is σ = 46304766768. Its totient is φ = 5342857632.

The previous prime is 18700001773. The next prime is 18700001851. The reversal of 18700001838 is 83810000781.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 74206231 + ... + 74206482.

It is an arithmetic number, because the mean of its divisors is an integer number (1929365282).

Almost surely, 2^18700001838 is an apocalyptic number.

18700001838 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

18700001838 is an abundant number, since it is smaller than the sum of its proper divisors (27604764930).

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

18700001838 is a wasteful number, since it uses less digits than its factorization.

18700001838 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 148412728 (or 148412725 counting only the distinct ones).

The product of its (nonzero) digits is 10752, while the sum is 36.

The spelling of 18700001838 in words is "eighteen billion, seven hundred million, one thousand, eight hundred thirty-eight".