18869746 has 16 divisors (see below), whose sum is σ = 32832576. Its totient is φ = 7965936.

The previous prime is 18869743. The next prime is 18869759. The reversal of 18869746 is 64796881.

It is a self number, because there is not a number n which added to its sum of digits gives 18869746.

It is not an unprimeable number, because it can be changed into a prime (18869743) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9121 + ... + 10996.

It is an arithmetic number, because the mean of its divisors is an integer number (2052036).

Almost surely, 2^18869746 is an apocalyptic number.

18869746 is a deficient number, since it is larger than the sum of its proper divisors (13962830).

18869746 is a wasteful number, since it uses less digits than its factorization.

18869746 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20193.

The product of its digits is 580608, while the sum is 49.

The square root of 18869746 is about 4343.9320897086. The cubic root of 18869746 is about 266.2289942063.

The spelling of 18869746 in words is "eighteen million, eight hundred sixty-nine thousand, seven hundred forty-six".