18856244 has 12 divisors (see below), whose sum is σ = 35998368. Its totient is φ = 8571000.

The previous prime is 18856219. The next prime is 18856267. The reversal of 18856244 is 44265881.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 18856198 and 18856207.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 214232 + ... + 214319.

It is an arithmetic number, because the mean of its divisors is an integer number (2999864).

Almost surely, 2^18856244 is an apocalyptic number.

It is an amenable number.

18856244 is a deficient number, since it is larger than the sum of its proper divisors (17142124).

18856244 is a wasteful number, since it uses less digits than its factorization.

18856244 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 428566 (or 428564 counting only the distinct ones).

The product of its digits is 61440, while the sum is 38.

The square root of 18856244 is about 4342.3776896995. The cubic root of 18856244 is about 266.1654801632.

The spelling of 18856244 in words is "eighteen million, eight hundred fifty-six thousand, two hundred forty-four".