18436331719 has 16 divisors (see below), whose sum is σ = 20317127040. Its totient is φ = 16623060480.

The previous prime is 18436331713. The next prime is 18436331723. The reversal of 18436331719 is 91713363481.

It is a de Polignac number, because none of the positive numbers 2^k-18436331719 is a prime.

It is a super-2 number, since 2×18436331719² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18436331713) 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, 281359 + ... + 340639.

It is an arithmetic number, because the mean of its divisors is an integer number (1269820440).

Almost surely, 2^18436331719 is an apocalyptic number.

18436331719 is a deficient number, since it is larger than the sum of its proper divisors (1880795321).

18436331719 is a wasteful number, since it uses less digits than its factorization.

18436331719 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 59850.

The product of its digits is 326592, while the sum is 46.

The spelling of 18436331719 in words is "eighteen billion, four hundred thirty-six million, three hundred thirty-one thousand, seven hundred nineteen".