19195200000 has 720 divisors, whose sum is σ = 73139818752. Its totient is φ = 4838400000.

The previous prime is 19195199951. The next prime is 19195200019. The reversal of 19195200000 is 259191.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (720).

It is an unprimeable number.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 446399979 + ... + 446400021.

Almost surely, 2^19195200000 is an apocalyptic number.

19195200000 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 19195200000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (36569909376).

19195200000 is an abundant number, since it is smaller than the sum of its proper divisors (53944618752).

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

19195200000 is an frugal number, since it uses more digits than its factorization.

19195200000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 123 (or 84 counting only the distinct ones).

The product of its (nonzero) digits is 810, while the sum is 27.

Adding to 19195200000 its reverse (259191), we get a palindrome (19195459191).

The spelling of 19195200000 in words is "nineteen billion, one hundred ninety-five million, two hundred thousand".