18043237152 has 72 divisors (see below), whose sum is σ = 51427696320. Its totient is φ = 6000670080.

The previous prime is 18043237151. The next prime is 18043237169. The reversal of 18043237152 is 25173234081.

18043237152 is a `hidden beast` number, since 180 + 4 + 323 + 7 + 152 = 666.

It is a tau number, because it is divible by the number of its divisors (72).

It is a super-2 number, since 2×18043237152² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (18043237151) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 55077 + ... + 197787.

It is an arithmetic number, because the mean of its divisors is an integer number (714273560).

Almost surely, 2^18043237152 is an apocalyptic number.

18043237152 is a gapful number since it is divisible by the number (12) 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 18043237152, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25713848160).

18043237152 is an abundant number, since it is smaller than the sum of its proper divisors (33384459168).

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

18043237152 is a wasteful number, since it uses less digits than its factorization.

18043237152 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 143166 (or 143155 counting only the distinct ones).

The product of its (nonzero) digits is 40320, while the sum is 36.

The spelling of 18043237152 in words is "eighteen billion, forty-three million, two hundred thirty-seven thousand, one hundred fifty-two".