19856689111098 has 96 divisors (see below), whose sum is σ = 49829807978496. Its totient is φ = 5597274364704.

The previous prime is 19856689111087. The next prime is 19856689111109. The reversal of 19856689111098 is 89011198665891.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (19856689111087) and next prime (19856689111109).

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 6297115 + ... + 8908817.

It is an arithmetic number, because the mean of its divisors is an integer number (519060499776).

Almost surely, 2^{19856689111098} is an apocalyptic number.

19856689111098 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 19856689111098, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24914903989248).

19856689111098 is an abundant number, since it is smaller than the sum of its proper divisors (29973118867398).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

19856689111098 is a wasteful number, since it uses less digits than its factorization.

19856689111098 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2612528 (or 2612525 counting only the distinct ones).

The product of its (nonzero) digits is 67184640, while the sum is 72.

The spelling of 19856689111098 in words is "nineteen trillion, eight hundred fifty-six billion, six hundred eighty-nine million, one hundred eleven thousand, ninety-eight".