18432172080 has 480 divisors, whose sum is σ = 77236723200. Its totient is φ = 3990767616.

The previous prime is 18432172079. The next prime is 18432172133. The reversal of 18432172080 is 8027123481.

18432172080 is a `hidden beast` number, since 1 + 8 + 432 + 17 + 208 + 0 = 666.

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

It is an unprimeable number.

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 95 ways as a sum of consecutive naturals, for example, 2581956 + ... + 2589084.

It is an arithmetic number, because the mean of its divisors is an integer number (160909840).

Almost surely, 2^18432172080 is an apocalyptic number.

18432172080 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 18432172080, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (38618361600).

18432172080 is an abundant number, since it is smaller than the sum of its proper divisors (58804551120).

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

18432172080 is a wasteful number, since it uses less digits than its factorization.

18432172080 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7183 (or 7165 counting only the distinct ones).

The product of its (nonzero) digits is 21504, while the sum is 36.

The spelling of 18432172080 in words is "eighteen billion, four hundred thirty-two million, one hundred seventy-two thousand, eighty".