18914894 has 4 divisors (see below), whose sum is σ = 28372344. Its totient is φ = 9457446.

The previous prime is 18914893. The next prime is 18914923. The reversal of 18914894 is 49841981.

It is a semiprime because it is the product of two primes.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18914893) 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 as a sum of consecutive naturals, namely, 4728722 + ... + 4728725.

It is an arithmetic number, because the mean of its divisors is an integer number (7093086).

Almost surely, 2^18914894 is an apocalyptic number.

18914894 is a deficient number, since it is larger than the sum of its proper divisors (9457450).

18914894 is an equidigital number, since it uses as much as digits as its factorization.

18914894 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9457449.

The product of its digits is 82944, while the sum is 44.

The square root of 18914894 is about 4349.1256592561. The cubic root of 18914894 is about 266.4411527446.

The spelling of 18914894 in words is "eighteen million, nine hundred fourteen thousand, eight hundred ninety-four".