18120242 has 8 divisors (see below), whose sum is σ = 31063296. Its totient is φ = 7765812.

The previous prime is 18120241. The next prime is 18120247. The reversal of 18120242 is 24202181.

It is a happy number.

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

It is not an unprimeable number, because it can be changed into a prime (18120241) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 647138 + ... + 647165.

It is an arithmetic number, because the mean of its divisors is an integer number (3882912).

Almost surely, 2^18120242 is an apocalyptic number.

18120242 is a deficient number, since it is larger than the sum of its proper divisors (12943054).

18120242 is a wasteful number, since it uses less digits than its factorization.

18120242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1294312.

The product of its (nonzero) digits is 256, while the sum is 20.

The square root of 18120242 is about 4256.7877560433. The cubic root of 18120242 is about 262.6564062603.

The spelling of 18120242 in words is "eighteen million, one hundred twenty thousand, two hundred forty-two".