18040964 has 6 divisors (see below), whose sum is σ = 31571694. Its totient is φ = 9020480.

The previous prime is 18040931. The next prime is 18040969. The reversal of 18040964 is 46904081.

It can be written as a sum of positive squares in only one way, i.e., 17056900 + 984064 = 4130^2 + 992^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 18040964.

It is not an unprimeable number, because it can be changed into a prime (18040969) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2255117 + ... + 2255124.

It is an arithmetic number, because the mean of its divisors is an integer number (5261949).

Almost surely, 2^18040964 is an apocalyptic number.

It is an amenable number.

18040964 is a deficient number, since it is larger than the sum of its proper divisors (13530730).

18040964 is a wasteful number, since it uses less digits than its factorization.

18040964 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4510245 (or 4510243 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 32.

The square root of 18040964 is about 4247.4655972709. The cubic root of 18040964 is about 262.2727962983.

The spelling of 18040964 in words is "eighteen million, forty thousand, nine hundred sixty-four".