18120340 has 48 divisors (see below), whose sum is σ = 43731072. Its totient is φ = 6178176.

The previous prime is 18120307. The next prime is 18120353. The reversal of 18120340 is 4302181.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 48394 + ... + 48766.

It is an arithmetic number, because the mean of its divisors is an integer number (911064).

Almost surely, 2^18120340 is an apocalyptic number.

18120340 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18120340 is an abundant number, since it is smaller than the sum of its proper divisors (25610732).

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

18120340 is a wasteful number, since it uses less digits than its factorization.

18120340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 736 (or 734 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 19.

The square root of 18120340 is about 4256.7992670550. The cubic root of 18120340 is about 262.6568797691.

The spelling of 18120340 in words is "eighteen million, one hundred twenty thousand, three hundred forty".