18140526 has 12 divisors (see below), whose sum is σ = 39304512. Its totient is φ = 6046836.

The previous prime is 18140519. The next prime is 18140527. The reversal of 18140526 is 62504181.

It is a self number, because there is not a number n which added to its sum of digits gives 18140526.

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 5 ways as a sum of consecutive naturals, for example, 503886 + ... + 503921.

It is an arithmetic number, because the mean of its divisors is an integer number (3275376).

Almost surely, 2^18140526 is an apocalyptic number.

18140526 is an abundant number, since it is smaller than the sum of its proper divisors (21163986).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

18140526 is a wasteful number, since it uses less digits than its factorization.

18140526 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1007815 (or 1007812 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 27.

The square root of 18140526 is about 4259.1696373824. The cubic root of 18140526 is about 262.7543765451.

The spelling of 18140526 in words is "eighteen million, one hundred forty thousand, five hundred twenty-six".