18043129682440 has 16 divisors (see below), whose sum is σ = 40597041785580. Its totient is φ = 7217251872960.

The previous prime is 18043129682437. The next prime is 18043129682447. The reversal of 18043129682440 is 4428692134081.

It can be written as a sum of positive squares in 2 ways, for example, as 14753542189156 + 3289587493284 = 3841034^2 + 1813722^2 .

It is not an unprimeable number, because it can be changed into a prime (18043129682447) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 225539120991 + ... + 225539121070.

Almost surely, 2^{18043129682440} is an apocalyptic number.

18043129682440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18043129682440 is an abundant number, since it is smaller than the sum of its proper divisors (22553912103140).

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

18043129682440 is a wasteful number, since it uses less digits than its factorization.

18043129682440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 451078242072 (or 451078242068 counting only the distinct ones).

The product of its (nonzero) digits is 2654208, while the sum is 52.

The spelling of 18043129682440 in words is "eighteen trillion, forty-three billion, one hundred twenty-nine million, six hundred eighty-two thousand, four hundred forty".