18140494 has 8 divisors (see below), whose sum is σ = 27672120. Its totient is φ = 8916456.

The previous prime is 18140489. The next prime is 18140501. The reversal of 18140494 is 49404181.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 76749 + ... + 76984.

It is an arithmetic number, because the mean of its divisors is an integer number (3459015).

Almost surely, 2^18140494 is an apocalyptic number.

18140494 is a deficient number, since it is larger than the sum of its proper divisors (9531626).

18140494 is a wasteful number, since it uses less digits than its factorization.

18140494 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 153794.

The product of its (nonzero) digits is 4608, while the sum is 31.

The square root of 18140494 is about 4259.1658807799. The cubic root of 18140494 is about 262.7542220449.

The spelling of 18140494 in words is "eighteen million, one hundred forty thousand, four hundred ninety-four".