18840074 has 16 divisors (see below), whose sum is σ = 31582656. Its totient is φ = 8354400.

The previous prime is 18840071. The next prime is 18840083. The reversal of 18840074 is 47004881.

It is a self number, because there is not a number n which added to its sum of digits gives 18840074.

It is not an unprimeable number, because it can be changed into a prime (18840071) 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 7 ways as a sum of consecutive naturals, for example, 9542 + ... + 11345.

It is an arithmetic number, because the mean of its divisors is an integer number (1973916).

Almost surely, 2^18840074 is an apocalyptic number.

18840074 is a deficient number, since it is larger than the sum of its proper divisors (12742582).

18840074 is a wasteful number, since it uses less digits than its factorization.

18840074 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20941.

The product of its (nonzero) digits is 7168, while the sum is 32.

The square root of 18840074 is about 4340.5154071838. The cubic root of 18840074 is about 266.0893758119.

The spelling of 18840074 in words is "eighteen million, eight hundred forty thousand, seventy-four".