181800000396 has 96 divisors (see below), whose sum is σ = 539295680000. Its totient is φ = 51882202944.

The previous prime is 181800000379. The next prime is 181800000413. The reversal of 181800000396 is 693000008181.

It is an interprime number because it is at equal distance from previous prime (181800000379) and next prime (181800000413).

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

It is a self number, because there is not a number n which added to its sum of digits gives 181800000396.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 509430 + ... + 789378.

Almost surely, 2^181800000396 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 181800000396, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (269647840000).

181800000396 is an abundant number, since it is smaller than the sum of its proper divisors (357495679604).

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

181800000396 is a wasteful number, since it uses less digits than its factorization.

181800000396 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 280828 (or 280820 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 36.

The spelling of 181800000396 in words is "one hundred eighty-one billion, eight hundred million, three hundred ninety-six", and thus it is an aban number.