18011072 has 14 divisors (see below), whose sum is σ = 35740848. Its totient is φ = 9005504.

The previous prime is 18011039. The next prime is 18011101. The reversal of 18011072 is 27011081.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 140648 + ... + 140775.

Almost surely, 2^18011072 is an apocalyptic number.

It is an amenable number.

18011072 is a deficient number, since it is larger than the sum of its proper divisors (17729776).

18011072 is an equidigital number, since it uses as much as digits as its factorization.

18011072 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 281435 (or 281425 counting only the distinct ones).

The product of its (nonzero) digits is 112, while the sum is 20.

The square root of 18011072 is about 4243.9453342379. The cubic root of 18011072 is about 262.1278633120.

Subtracting 18011072 from its reverse (27011081), we obtain a palindrome (9000009).

The spelling of 18011072 in words is "eighteen million, eleven thousand, seventy-two".