19990035000 has 240 divisors, whose sum is σ = 72859146360. Its totient is φ = 4920480000.

The previous prime is 19990034993. The next prime is 19990035007. The reversal of 19990035000 is 53009991.

It is an interprime number because it is at equal distance from previous prime (19990034993) and next prime (19990035007).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19990035007) by changing a digit.

It is a polite number, since it can be written in 59 ways as a sum of consecutive naturals, for example, 567915 + ... + 602085.

Almost surely, 2^19990035000 is an apocalyptic number.

19990035000 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 19990035000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (36429573180).

19990035000 is an abundant number, since it is smaller than the sum of its proper divisors (52869111360).

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

19990035000 is a wasteful number, since it uses less digits than its factorization.

19990035000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34216 (or 34194 counting only the distinct ones).

The product of its (nonzero) digits is 10935, while the sum is 36.

The spelling of 19990035000 in words is "nineteen billion, nine hundred ninety million, thirty-five thousand".