181105420 has 24 divisors (see below), whose sum is σ = 402693984. Its totient is φ = 68180736.

The previous prime is 181105411. The next prime is 181105447. The reversal of 181105420 is 24501181.

181105420 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 181105391 and 181105400.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 265992 + ... + 266671.

It is an arithmetic number, because the mean of its divisors is an integer number (16778916).

Almost surely, 2^181105420 is an apocalyptic number.

181105420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

181105420 is an abundant number, since it is smaller than the sum of its proper divisors (221588564).

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

181105420 is a wasteful number, since it uses less digits than its factorization.

181105420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 532689 (or 532687 counting only the distinct ones).

The product of its (nonzero) digits is 320, while the sum is 22.

The square root of 181105420 is about 13457.5413802076. The cubic root of 181105420 is about 565.7750815889.

The spelling of 181105420 in words is "one hundred eighty-one million, one hundred five thousand, four hundred twenty".