18011132 has 6 divisors (see below), whose sum is σ = 31519488. Its totient is φ = 9005564.

The previous prime is 18011113. The next prime is 18011137. The reversal of 18011132 is 23111081.

It is a self number, because there is not a number n which added to its sum of digits gives 18011132.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18011137) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2251388 + ... + 2251395.

It is an arithmetic number, because the mean of its divisors is an integer number (5253248).

Almost surely, 2^18011132 is an apocalyptic number.

It is an amenable number.

18011132 is a deficient number, since it is larger than the sum of its proper divisors (13508356).

18011132 is a wasteful number, since it uses less digits than its factorization.

18011132 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4502787 (or 4502785 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 17.

The square root of 18011132 is about 4243.9524031261. The cubic root of 18011132 is about 262.1281543859.

The spelling of 18011132 in words is "eighteen million, eleven thousand, one hundred thirty-two".