18045501 has 8 divisors (see below), whose sum is σ = 25106880. Its totient is φ = 11507232.

The previous prime is 18045491. The next prime is 18045541. The reversal of 18045501 is 10554081.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 18045501 - 2⁶ = 18045437 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18045541) 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 7 ways as a sum of consecutive naturals, for example, 130696 + ... + 130833.

It is an arithmetic number, because the mean of its divisors is an integer number (3138360).

Almost surely, 2^18045501 is an apocalyptic number.

It is an amenable number.

18045501 is a deficient number, since it is larger than the sum of its proper divisors (7061379).

18045501 is a wasteful number, since it uses less digits than its factorization.

18045501 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 261555.

The product of its (nonzero) digits is 800, while the sum is 24.

The square root of 18045501 is about 4247.9996468926. Note that the first 3 decimals coincide. The cubic root of 18045501 is about 262.2947801926.

Adding to 18045501 its reverse (10554081), we get a palindrome (28599582).

The spelling of 18045501 in words is "eighteen million, forty-five thousand, five hundred one".