18898244 has 6 divisors (see below), whose sum is σ = 33071934. Its totient is φ = 9449120.

The previous prime is 18898241. The next prime is 18898261. The reversal of 18898244 is 44289881.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 17305600 + 1592644 = 4160^2 + 1262^2 .

It is a junction number, because it is equal to n+sod(n) for n = 18898195 and 18898204.

It is not an unprimeable number, because it can be changed into a prime (18898241) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2362277 + ... + 2362284.

It is an arithmetic number, because the mean of its divisors is an integer number (5511989).

Almost surely, 2^18898244 is an apocalyptic number.

It is an amenable number.

18898244 is a deficient number, since it is larger than the sum of its proper divisors (14173690).

18898244 is a wasteful number, since it uses less digits than its factorization.

18898244 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4724565 (or 4724563 counting only the distinct ones).

The product of its digits is 147456, while the sum is 44.

The square root of 18898244 is about 4347.2110599786. The cubic root of 18898244 is about 266.3629507465.

The spelling of 18898244 in words is "eighteen million, eight hundred ninety-eight thousand, two hundred forty-four".