19489946 has 16 divisors (see below), whose sum is σ = 34094400. Its totient is φ = 8352540.

The previous prime is 19489937. The next prime is 19489999. The reversal of 19489946 is 64998491.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 19489894 and 19489903.

It is an unprimeable number.

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, 13520 + ... + 14891.

It is an arithmetic number, because the mean of its divisors is an integer number (2130900).

Almost surely, 2^19489946 is an apocalyptic number.

19489946 is a deficient number, since it is larger than the sum of its proper divisors (14604454).

19489946 is an equidigital number, since it uses as much as digits as its factorization.

19489946 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28434 (or 28420 counting only the distinct ones).

The product of its digits is 559872, while the sum is 50.

The square root of 19489946 is about 4414.7418950602. The cubic root of 19489946 is about 269.1143638317.

The spelling of 19489946 in words is "nineteen million, four hundred eighty-nine thousand, nine hundred forty-six".