18159983040 has 448 divisors, whose sum is σ = 62226017280. Its totient is φ = 4476764160.

The previous prime is 18159983027. The next prime is 18159983081. The reversal of 18159983040 is 4038995181.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 130647291 + ... + 130647429.

It is an arithmetic number, because the mean of its divisors is an integer number (138897360).

Almost surely, 2^18159983040 is an apocalyptic number.

18159983040 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18159983040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31113008640).

18159983040 is an abundant number, since it is smaller than the sum of its proper divisors (44066034240).

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

18159983040 is a wasteful number, since it uses less digits than its factorization.

18159983040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 340 (or 330 counting only the distinct ones).

The product of its (nonzero) digits is 311040, while the sum is 48.

The spelling of 18159983040 in words is "eighteen billion, one hundred fifty-nine million, nine hundred eighty-three thousand, forty".