19981298 has 16 divisors (see below), whose sum is σ = 31601664. Its totient is φ = 9461280.

The previous prime is 19981289. The next prime is 19981303. The reversal of 19981298 is 89218991.

It is a Harshad number since it is a multiple of its sum of digits (47).

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 in 7 ways as a sum of consecutive naturals, for example, 515 + ... + 6342.

It is an arithmetic number, because the mean of its divisors is an integer number (1975104).

Almost surely, 2^19981298 is an apocalyptic number.

19981298 is a deficient number, since it is larger than the sum of its proper divisors (11620366).

19981298 is a wasteful number, since it uses less digits than its factorization.

19981298 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6937.

The product of its digits is 93312, while the sum is 47.

The square root of 19981298 is about 4470.0445187940. The cubic root of 19981298 is about 271.3571268762.

The spelling of 19981298 in words is "nineteen million, nine hundred eighty-one thousand, two hundred ninety-eight".