18041872 has 10 divisors (see below), whose sum is σ = 34956158. Its totient is φ = 9020928.

The previous prime is 18041869. The next prime is 18041873. The reversal of 18041872 is 27814081.

It can be written as a sum of positive squares in only one way, i.e., 14714896 + 3326976 = 3836^2 + 1824^2 .

It is not an unprimeable number, because it can be changed into a prime (18041873) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 563793 + ... + 563824.

Almost surely, 2^18041872 is an apocalyptic number.

It is an amenable number.

18041872 is a deficient number, since it is larger than the sum of its proper divisors (16914286).

18041872 is a wasteful number, since it uses less digits than its factorization.

18041872 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1127625 (or 1127619 counting only the distinct ones).

The product of its (nonzero) digits is 3584, while the sum is 31.

The square root of 18041872 is about 4247.5724831955. The cubic root of 18041872 is about 262.2771962794.

The spelling of 18041872 in words is "eighteen million, forty-one thousand, eight hundred seventy-two".