18525069 has 6 divisors (see below), whose sum is σ = 26758446. Its totient is φ = 12350040.

The previous prime is 18525047. The next prime is 18525079. The reversal of 18525069 is 96052581.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 14722569 + 3802500 = 3837^2 + 1950^2 .

It is not a de Polignac number, because 18525069 - 2⁷ = 18524941 is a prime.

It is a super-2 number, since 2×18525069² = 686356362909522, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18525079) 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 5 ways as a sum of consecutive naturals, for example, 1029162 + ... + 1029179.

It is an arithmetic number, because the mean of its divisors is an integer number (4459741).

Almost surely, 2^18525069 is an apocalyptic number.

It is an amenable number.

18525069 is a deficient number, since it is larger than the sum of its proper divisors (8233377).

18525069 is a wasteful number, since it uses less digits than its factorization.

18525069 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2058347 (or 2058344 counting only the distinct ones).

The product of its (nonzero) digits is 21600, while the sum is 36.

The square root of 18525069 is about 4304.0758589969. The cubic root of 18525069 is about 264.5980330409.

The spelling of 18525069 in words is "eighteen million, five hundred twenty-five thousand, sixty-nine".