18013786 has 32 divisors (see below), whose sum is σ = 32757120. Its totient is φ = 7257600.

The previous prime is 18013781. The next prime is 18013813. The reversal of 18013786 is 68731081.

It is not an unprimeable number, because it can be changed into a prime (18013781) 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 15 ways as a sum of consecutive naturals, for example, 63966 + ... + 64246.

It is an arithmetic number, because the mean of its divisors is an integer number (1023660).

Almost surely, 2^18013786 is an apocalyptic number.

18013786 is a deficient number, since it is larger than the sum of its proper divisors (14743334).

18013786 is a wasteful number, since it uses less digits than its factorization.

18013786 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 550.

The product of its (nonzero) digits is 8064, while the sum is 34.

The square root of 18013786 is about 4244.2650718352. The cubic root of 18013786 is about 262.1410289043.

The spelling of 18013786 in words is "eighteen million, thirteen thousand, seven hundred eighty-six".