18814842 has 20 divisors (see below), whose sum is σ = 42159546. Its totient is φ = 6271560.

The previous prime is 18814819. The next prime is 18814847. The reversal of 18814842 is 24841881.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 17816841 + 998001 = 4221^2 + 999^2 .

It is a junction number, because it is equal to n+sod(n) for n = 18814797 and 18814806.

It is not an unprimeable number, because it can be changed into a prime (18814847) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 57909 + ... + 58232.

Almost surely, 2^18814842 is an apocalyptic number.

18814842 is an abundant number, since it is smaller than the sum of its proper divisors (23344704).

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

18814842 is a wasteful number, since it uses less digits than its factorization.

18814842 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 116155 (or 116146 counting only the distinct ones).

The product of its digits is 16384, while the sum is 36.

The square root of 18814842 is about 4337.6078660939. The cubic root of 18814842 is about 265.9705339814.

The spelling of 18814842 in words is "eighteen million, eight hundred fourteen thousand, eight hundred forty-two".