18078141 has 16 divisors (see below), whose sum is σ = 24940224. Its totient is φ = 11641344.

The previous prime is 18078121. The next prime is 18078149. The reversal of 18078141 is 14187081.

It is not a de Polignac number, because 18078141 - 2⁶ = 18078077 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 18078099 and 18078108.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18078149) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9805 + ... + 11501.

It is an arithmetic number, because the mean of its divisors is an integer number (1558764).

Almost surely, 2^18078141 is an apocalyptic number.

It is an amenable number.

18078141 is a deficient number, since it is larger than the sum of its proper divisors (6862083).

18078141 is a wasteful number, since it uses less digits than its factorization.

18078141 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1820.

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

The square root of 18078141 is about 4251.8397194626. The cubic root of 18078141 is about 262.4528278047.

The spelling of 18078141 in words is "eighteen million, seventy-eight thousand, one hundred forty-one".