19910098944 has 304 divisors, whose sum is σ = 61656151200. Its totient is φ = 6341787648.

The previous prime is 19910098939. The next prime is 19910098961. The reversal of 19910098944 is 44989001991.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 205258704 + ... + 205258800.

Almost surely, 2^19910098944 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 19910098944, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30828075600).

19910098944 is an abundant number, since it is smaller than the sum of its proper divisors (41746052256).

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

19910098944 is an frugal number, since it uses more digits than its factorization.

19910098944 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 171 (or 131 counting only the distinct ones).

The product of its (nonzero) digits is 839808, while the sum is 54.

The spelling of 19910098944 in words is "nineteen billion, nine hundred ten million, ninety-eight thousand, nine hundred forty-four".