18011371 has 12 divisors (see below), whose sum is σ = 21043488. Its totient is φ = 15370992.

The previous prime is 18011359. The next prime is 18011401. The reversal of 18011371 is 17311081.

18011371 is nontrivially palindromic in base 15.

It is not a de Polignac number, because 18011371 - 2⁷ = 18011243 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18011471) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 12910 + ... + 14236.

It is an arithmetic number, because the mean of its divisors is an integer number (1753624).

Almost surely, 2^18011371 is an apocalyptic number.

18011371 is a deficient number, since it is larger than the sum of its proper divisors (3032117).

18011371 is a wasteful number, since it uses less digits than its factorization.

18011371 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1618 (or 1611 counting only the distinct ones).

The product of its (nonzero) digits is 168, while the sum is 22.

The square root of 18011371 is about 4243.9805607472. The cubic root of 18011371 is about 262.1293138235.

The spelling of 18011371 in words is "eighteen million, eleven thousand, three hundred seventy-one".