18457843019 has 16 divisors (see below), whose sum is σ = 23121459456. Its totient is φ = 14314557600.

The previous prime is 18457842989. The next prime is 18457843081. The reversal of 18457843019 is 91034875481.

It is a happy number.

It is not a de Polignac number, because 18457843019 - 2¹⁶ = 18457777483 is a prime.

It is a super-2 number, since 2×18457843019² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18457849019) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 551792 + ... + 584285.

It is an arithmetic number, because the mean of its divisors is an integer number (1445091216).

Almost surely, 2^18457843019 is an apocalyptic number.

18457843019 is a deficient number, since it is larger than the sum of its proper divisors (4663616437).

18457843019 is a wasteful number, since it uses less digits than its factorization.

18457843019 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1136306.

The product of its (nonzero) digits is 967680, while the sum is 50.

The spelling of 18457843019 in words is "eighteen billion, four hundred fifty-seven million, eight hundred forty-three thousand, nineteen".