18045623232 has 672 divisors, whose sum is σ = 67846431744. Its totient is φ = 4628275200.

The previous prime is 18045623213. The next prime is 18045623243. The reversal of 18045623232 is 23232654081.

18045623232 is a `hidden beast` number, since 1 + 8 + 0 + 4 + 5 + 623 + 23 + 2 = 666.

It is a tau number, because it is divible by the number of its divisors (672).

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 58024357 + ... + 58024667.

It is an arithmetic number, because the mean of its divisors is an integer number (100961952).

Almost surely, 2^18045623232 is an apocalyptic number.

18045623232 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 18045623232, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (33923215872).

18045623232 is an abundant number, since it is smaller than the sum of its proper divisors (49800808512).

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

18045623232 is a wasteful number, since it uses less digits than its factorization.

18045623232 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 399 (or 377 counting only the distinct ones).

The product of its (nonzero) digits is 69120, while the sum is 36.

The spelling of 18045623232 in words is "eighteen billion, forty-five million, six hundred twenty-three thousand, two hundred thirty-two".