18865242 has 24 divisors (see below), whose sum is σ = 44591040. Its totient is φ = 5716680.

The previous prime is 18865229. The next prime is 18865247. The reversal of 18865242 is 24256881.

It is a junction number, because it is equal to n+sod(n) for n = 18865197 and 18865206.

It is not an unprimeable number, because it can be changed into a prime (18865247) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 47442 + ... + 47837.

It is an arithmetic number, because the mean of its divisors is an integer number (1857960).

Almost surely, 2^18865242 is an apocalyptic number.

18865242 is an abundant number, since it is smaller than the sum of its proper divisors (25725798).

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

18865242 is a wasteful number, since it uses less digits than its factorization.

18865242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 95298 (or 95295 counting only the distinct ones).

The product of its digits is 30720, while the sum is 36.

The square root of 18865242 is about 4343.4136344585. The cubic root of 18865242 is about 266.2078105471.

The spelling of 18865242 in words is "eighteen million, eight hundred sixty-five thousand, two hundred forty-two".