18194140 has 24 divisors (see below), whose sum is σ = 38590272. Its totient is φ = 7204800.

The previous prime is 18194129. The next prime is 18194159. The reversal of 18194140 is 4149181.

It is a junction number, because it is equal to n+sod(n) for n = 18194099 and 18194108.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2484 + ... + 6523.

It is an arithmetic number, because the mean of its divisors is an integer number (1607928).

Almost surely, 2^18194140 is an apocalyptic number.

18194140 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18194140 is an abundant number, since it is smaller than the sum of its proper divisors (20396132).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

18194140 is a wasteful number, since it uses less digits than its factorization.

18194140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9117 (or 9115 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 28.

The square root of 18194140 is about 4265.4589436542. The cubic root of 18194140 is about 263.0129772351.

The spelling of 18194140 in words is "eighteen million, one hundred ninety-four thousand, one hundred forty".