19998369105 has 96 divisors (see below), whose sum is σ = 38604625920. Its totient is φ = 8759312640.

The previous prime is 19998369091. The next prime is 19998369113. The reversal of 19998369105 is 50196389991.

It is not a de Polignac number, because 19998369105 - 2¹⁴ = 19998352721 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 1302966 + ... + 1318224.

It is an arithmetic number, because the mean of its divisors is an integer number (402131520).

Almost surely, 2^19998369105 is an apocalyptic number.

19998369105 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

19998369105 is a deficient number, since it is larger than the sum of its proper divisors (18606256815).

19998369105 is a wasteful number, since it uses less digits than its factorization.

19998369105 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15351 (or 15338 counting only the distinct ones).

The product of its (nonzero) digits is 4723920, while the sum is 60.

The spelling of 19998369105 in words is "nineteen billion, nine hundred ninety-eight million, three hundred sixty-nine thousand, one hundred five".