18072404439 has 32 divisors (see below), whose sum is σ = 25865153280. Its totient is φ = 11189348352.

The previous prime is 18072404437. The next prime is 18072404453. The reversal of 18072404439 is 93440427081.

It is not a de Polignac number, because 18072404439 - 2¹ = 18072404437 is a prime.

It is a super-2 number, since 2×18072404439² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 18072404439.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18072404437) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 5759479 + ... + 5762615.

It is an arithmetic number, because the mean of its divisors is an integer number (808286040).

Almost surely, 2^18072404439 is an apocalyptic number.

18072404439 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

18072404439 is a deficient number, since it is larger than the sum of its proper divisors (7792748841).

18072404439 is a wasteful number, since it uses less digits than its factorization.

18072404439 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5119.

The product of its (nonzero) digits is 193536, while the sum is 42.

The spelling of 18072404439 in words is "eighteen billion, seventy-two million, four hundred four thousand, four hundred thirty-nine".