18003168432 has 160 divisors (see below), whose sum is σ = 53222784000. Its totient is φ = 5824016640.

The previous prime is 18003168413. The next prime is 18003168433. The reversal of 18003168432 is 23486130081.

It is a super-2 number, since 2×18003168432² (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 (18003168433) 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, 2009082 + ... + 2018022.

It is an arithmetic number, because the mean of its divisors is an integer number (332642400).

Almost surely, 2^18003168432 is an apocalyptic number.

18003168432 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 18003168432, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26611392000).

18003168432 is an abundant number, since it is smaller than the sum of its proper divisors (35219615568).

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

18003168432 is a wasteful number, since it uses less digits than its factorization.

18003168432 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9096 (or 9084 counting only the distinct ones).

The product of its (nonzero) digits is 27648, while the sum is 36.

The spelling of 18003168432 in words is "eighteen billion, three million, one hundred sixty-eight thousand, four hundred thirty-two".