18043850019 has 16 divisors (see below), whose sum is σ = 25921792512. Its totient is φ = 11098475808.

The previous prime is 18043849973. The next prime is 18043850039. The reversal of 18043850019 is 91005834081.

It is not a de Polignac number, because 18043850019 - 2⁷ = 18043849891 is a prime.

It is a super-2 number, since 2×18043850019² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is not an unprimeable number, because it can be changed into a prime (18043850039) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 31677 + ... + 192590.

It is an arithmetic number, because the mean of its divisors is an integer number (1620112032).

Almost surely, 2^18043850019 is an apocalyptic number.

18043850019 is a deficient number, since it is larger than the sum of its proper divisors (7877942493).

18043850019 is a wasteful number, since it uses less digits than its factorization.

18043850019 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 226346.

The product of its (nonzero) digits is 34560, while the sum is 39.

The spelling of 18043850019 in words is "eighteen billion, forty-three million, eight hundred fifty thousand, nineteen".