19898398232 has 8 divisors (see below), whose sum is σ = 37309496700. Its totient is φ = 9949199112.

The previous prime is 19898398213. The next prime is 19898398243. The reversal of 19898398232 is 23289389891.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

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, 1243649882 + ... + 1243649897.

Almost surely, 2^19898398232 is an apocalyptic number.

It is an amenable number.

19898398232 is a deficient number, since it is larger than the sum of its proper divisors (17411098468).

19898398232 is a wasteful number, since it uses less digits than its factorization.

19898398232 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2487299785 (or 2487299781 counting only the distinct ones).

The product of its digits is 13436928, while the sum is 62.

The spelling of 19898398232 in words is "nineteen billion, eight hundred ninety-eight million, three hundred ninety-eight thousand, two hundred thirty-two".