18180741 has 8 divisors (see below), whose sum is σ = 25295040. Its totient is φ = 11593472.

The previous prime is 18180733. The next prime is 18180751. The reversal of 18180741 is 14708181.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 18180741 - 2³ = 18180733 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 18180699 and 18180708.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18180731) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 131676 + ... + 131813.

It is an arithmetic number, because the mean of its divisors is an integer number (3161880).

Almost surely, 2^18180741 is an apocalyptic number.

It is an amenable number.

18180741 is a deficient number, since it is larger than the sum of its proper divisors (7114299).

18180741 is a wasteful number, since it uses less digits than its factorization.

18180741 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 263515.

The product of its (nonzero) digits is 1792, while the sum is 30.

The square root of 18180741 is about 4263.8880144769. Note that the first 3 decimals coincide. The cubic root of 18180741 is about 262.9483964352.

The spelling of 18180741 in words is "eighteen million, one hundred eighty thousand, seven hundred forty-one".