18877242 has 16 divisors (see below), whose sum is σ = 39975552. Its totient is φ = 5922240.

The previous prime is 18877223. The next prime is 18877247. The reversal of 18877242 is 24277881.

It is a self number, because there is not a number n which added to its sum of digits gives 18877242.

It is not an unprimeable number, because it can be changed into a prime (18877247) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 92434 + ... + 92637.

It is an arithmetic number, because the mean of its divisors is an integer number (2498472).

Almost surely, 2^18877242 is an apocalyptic number.

18877242 is an abundant number, since it is smaller than the sum of its proper divisors (21098310).

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

18877242 is a wasteful number, since it uses less digits than its factorization.

18877242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 185093.

The product of its digits is 50176, while the sum is 39.

The square root of 18877242 is about 4344.7948167894. The cubic root of 18877242 is about 266.2642426642.

The spelling of 18877242 in words is "eighteen million, eight hundred seventy-seven thousand, two hundred forty-two".