18995494 has 16 divisors (see below), whose sum is σ = 34479648. Its totient is φ = 7661952.

The previous prime is 18995491. The next prime is 18995503. The reversal of 18995494 is 49459981.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18995491) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 39669 + ... + 40144.

It is an arithmetic number, because the mean of its divisors is an integer number (2154978).

Almost surely, 2^18995494 is an apocalyptic number.

18995494 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

18995494 is a deficient number, since it is larger than the sum of its proper divisors (15484154).

18995494 is a wasteful number, since it uses less digits than its factorization.

18995494 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 79839.

The product of its digits is 466560, while the sum is 49.

The square root of 18995494 is about 4358.3820392435. The cubic root of 18995494 is about 266.8190687872.

The spelling of 18995494 in words is "eighteen million, nine hundred ninety-five thousand, four hundred ninety-four".