19973150208 has 640 divisors, whose sum is σ = 70395494400. Its totient is φ = 5524070400.

The previous prime is 19973150191. The next prime is 19973150209. The reversal of 19973150208 is 80205137991.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19973150209) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 89565585 + ... + 89565807.

It is an arithmetic number, because the mean of its divisors is an integer number (109992960).

Almost surely, 2^19973150208 is an apocalyptic number.

19973150208 is a gapful number since it is divisible by the number (18) 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 19973150208, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (35197747200).

19973150208 is an abundant number, since it is smaller than the sum of its proper divisors (50422344192).

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

19973150208 is a wasteful number, since it uses less digits than its factorization.

19973150208 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 311 (or 289 counting only the distinct ones).

The product of its (nonzero) digits is 136080, while the sum is 45.

The spelling of 19973150208 in words is "nineteen billion, nine hundred seventy-three million, one hundred fifty thousand, two hundred eight".