18240575 has 24 divisors (see below), whose sum is σ = 24185952. Its totient is φ = 13598720.

The previous prime is 18240529. The next prime is 18240577. The reversal of 18240575 is 57504281.

It is not a de Polignac number, because 18240575 - 2⁶ = 18240511 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18240577) 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 23 ways as a sum of consecutive naturals, for example, 70847 + ... + 71103.

It is an arithmetic number, because the mean of its divisors is an integer number (1007748).

Almost surely, 2^18240575 is an apocalyptic number.

18240575 is a deficient number, since it is larger than the sum of its proper divisors (5945377).

18240575 is a wasteful number, since it uses less digits than its factorization.

18240575 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 451 (or 446 counting only the distinct ones).

The product of its (nonzero) digits is 11200, while the sum is 32.

The square root of 18240575 is about 4270.8986173872. The cubic root of 18240575 is about 263.2365406519.

The spelling of 18240575 in words is "eighteen million, two hundred forty thousand, five hundred seventy-five".