181113420 has 48 divisors (see below), whose sum is σ = 518918400. Its totient is φ = 47173056.

The previous prime is 181113397. The next prime is 181113433. The reversal of 181113420 is 24311181.

It is a happy number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 32520 + ... + 37679.

It is an arithmetic number, because the mean of its divisors is an integer number (10810800).

Almost surely, 2^181113420 is an apocalyptic number.

181113420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

181113420 is an abundant number, since it is smaller than the sum of its proper divisors (337804980).

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

181113420 is a wasteful number, since it uses less digits than its factorization.

181113420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70254 (or 70252 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 21.

The square root of 181113420 is about 13457.8386080381. The cubic root of 181113420 is about 565.7834121586.

The spelling of 181113420 in words is "one hundred eighty-one million, one hundred thirteen thousand, four hundred twenty".