18390141 has 72 divisors (see below), whose sum is σ = 35852544. Its totient is φ = 8951040.

The previous prime is 18390131. The next prime is 18390167. The reversal of 18390141 is 14109381.

It is not a de Polignac number, because 18390141 - 2⁷ = 18390013 is a prime.

It is a hoax number, since the sum of its digits (27) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18390101) by changing a digit.

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 71 ways as a sum of consecutive naturals, for example, 82356 + ... + 82578.

It is an arithmetic number, because the mean of its divisors is an integer number (497952).

Almost surely, 2^18390141 is an apocalyptic number.

18390141 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

18390141 is a deficient number, since it is larger than the sum of its proper divisors (17462403).

18390141 is a wasteful number, since it uses less digits than its factorization.

18390141 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 271 (or 261 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 27.

The square root of 18390141 is about 4288.3727683120. The cubic root of 18390141 is about 263.9540639773.

The spelling of 18390141 in words is "eighteen million, three hundred ninety thousand, one hundred forty-one".