18020575 has 12 divisors (see below), whose sum is σ = 22465080. Its totient is φ = 14339360.

The previous prime is 18020573. The next prime is 18020623. The reversal of 18020575 is 57502081.

It is not a de Polignac number, because 18020575 - 2¹ = 18020573 is a prime.

It is a super-2 number, since 2×18020575² = 649482246661250, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18020573) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3096 + ... + 6754.

It is an arithmetic number, because the mean of its divisors is an integer number (1872090).

Almost surely, 2^18020575 is an apocalyptic number.

18020575 is a deficient number, since it is larger than the sum of its proper divisors (4444505).

18020575 is a wasteful number, since it uses less digits than its factorization.

18020575 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3866 (or 3861 counting only the distinct ones).

The product of its (nonzero) digits is 2800, while the sum is 28.

The square root of 18020575 is about 4245.0647816023. The cubic root of 18020575 is about 262.1739564987.

The spelling of 18020575 in words is "eighteen million, twenty thousand, five hundred seventy-five".