18242378 has 16 divisors (see below), whose sum is σ = 34115904. Its totient is φ = 7107360.

The previous prime is 18242359. The next prime is 18242423. The reversal of 18242378 is 87324281.

It is a super-3 number, since 3×18242378³ (a number of 23 digits) contains 333 as substring.

It is a Curzon 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, 59075 + ... + 59382.

It is an arithmetic number, because the mean of its divisors is an integer number (2132244).

Almost surely, 2^18242378 is an apocalyptic number.

18242378 is a deficient number, since it is larger than the sum of its proper divisors (15873526).

18242378 is a wasteful number, since it uses less digits than its factorization.

18242378 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 118477.

The product of its digits is 21504, while the sum is 35.

The square root of 18242378 is about 4271.1096918717. The cubic root of 18242378 is about 263.2452136213.

The spelling of 18242378 in words is "eighteen million, two hundred forty-two thousand, three hundred seventy-eight".