18140534 has 8 divisors (see below), whose sum is σ = 27229608. Its totient is φ = 9064000.

The previous prime is 18140531. The next prime is 18140557. The reversal of 18140534 is 43504181.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18140531) 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 3 ways as a sum of consecutive naturals, for example, 2534 + ... + 6534.

It is an arithmetic number, because the mean of its divisors is an integer number (3403701).

Almost surely, 2^18140534 is an apocalyptic number.

18140534 is a deficient number, since it is larger than the sum of its proper divisors (9089074).

18140534 is a wasteful number, since it uses less digits than its factorization.

18140534 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6270.

The product of its (nonzero) digits is 1920, while the sum is 26.

The square root of 18140534 is about 4259.1705765325. The cubic root of 18140534 is about 262.7544151702.

The spelling of 18140534 in words is "eighteen million, one hundred forty thousand, five hundred thirty-four".