19898869905129 has 8 divisors (see below), whose sum is σ = 27178944260832. Its totient is φ = 12942354409760.

The previous prime is 19898869905113. The next prime is 19898869905143. The reversal of 19898869905129 is 92150996889891.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 19898869905129 - 2⁴ = 19898869905113 is a prime.

It is a super-3 number, since 3×19898869905129³ (a number of 41 digits) contains 333 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (19898869915129) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 80889714939 + ... + 80889715184.

It is an arithmetic number, because the mean of its divisors is an integer number (3397368032604).

Almost surely, 2^{19898869905129} is an apocalyptic number.

It is an amenable number.

19898869905129 is a deficient number, since it is larger than the sum of its proper divisors (7280074355703).

19898869905129 is a wasteful number, since it uses less digits than its factorization.

19898869905129 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 161779430167.

The product of its (nonzero) digits is 1813985280, while the sum is 84.

The spelling of 19898869905129 in words is "nineteen trillion, eight hundred ninety-eight billion, eight hundred sixty-nine million, nine hundred five thousand, one hundred twenty-nine".