18140525 has 12 divisors (see below), whose sum is σ = 24225012. Its totient is φ = 13395840.

The previous prime is 18140519. The next prime is 18140527. The reversal of 18140525 is 52504181.

It can be written as a sum of positive squares in 6 ways, for example, as 1444 + 18139081 = 38^2 + 4259^2 .

It is not a de Polignac number, because 18140525 - 2⁶ = 18140461 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 18140494 and 18140503.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18140527) 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 11 ways as a sum of consecutive naturals, for example, 27584 + ... + 28233.

It is an arithmetic number, because the mean of its divisors is an integer number (2018751).

Almost surely, 2^18140525 is an apocalyptic number.

It is an amenable number.

18140525 is a deficient number, since it is larger than the sum of its proper divisors (6084487).

18140525 is a wasteful number, since it uses less digits than its factorization.

18140525 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55840 (or 55835 counting only the distinct ones).

The product of its (nonzero) digits is 1600, while the sum is 26.

The square root of 18140525 is about 4259.1695199886. The cubic root of 18140525 is about 262.7543717170.

The spelling of 18140525 in words is "eighteen million, one hundred forty thousand, five hundred twenty-five".