18031711488 has 432 divisors, whose sum is σ = 59189792256. Its totient is φ = 4849152000.

The previous prime is 18031711483. The next prime is 18031711513. The reversal of 18031711488 is 88411713081.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18031711483) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 71839363 + ... + 71839613.

It is an arithmetic number, because the mean of its divisors is an integer number (137013408).

Almost surely, 2^18031711488 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18031711488, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29594896128).

18031711488 is an abundant number, since it is smaller than the sum of its proper divisors (41158080768).

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

18031711488 is a wasteful number, since it uses less digits than its factorization.

18031711488 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 390 (or 369 counting only the distinct ones).

The product of its (nonzero) digits is 43008, while the sum is 42.

The spelling of 18031711488 in words is "eighteen billion, thirty-one million, seven hundred eleven thousand, four hundred eighty-eight".