19498994 has 4 divisors (see below), whose sum is σ = 29248494. Its totient is φ = 9749496.

The previous prime is 19498981. The next prime is 19499041. The reversal of 19498994 is 49989491.

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

It can be written as a sum of positive squares in only one way, i.e., 13801225 + 5697769 = 3715^2 + 2387^2 .

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 4874747 + ... + 4874750.

Almost surely, 2^19498994 is an apocalyptic number.

19498994 is a deficient number, since it is larger than the sum of its proper divisors (9749500).

19498994 is an equidigital number, since it uses as much as digits as its factorization.

19498994 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9749499.

The product of its digits is 839808, while the sum is 53.

The square root of 19498994 is about 4415.7665246251. The cubic root of 19498994 is about 269.1560018821.

The spelling of 19498994 in words is "nineteen million, four hundred ninety-eight thousand, nine hundred ninety-four".