2081917500 has 240 divisors, whose sum is σ = 6627578496. Its totient is φ = 505440000.

The previous prime is 2081917417. The next prime is 2081917501. The reversal of 2081917500 is 57191802.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2081917501) by changing a digit.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 12772419 + ... + 12772581.

Almost surely, 2^2081917500 is an apocalyptic number.

2081917500 is a gapful number since it is divisible by the number (20) 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 2081917500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3313789248).

2081917500 is an abundant number, since it is smaller than the sum of its proper divisors (4545660996).

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

2081917500 is a wasteful number, since it uses less digits than its factorization.

2081917500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 334 (or 317 counting only the distinct ones).

The product of its (nonzero) digits is 5040, while the sum is 33.

The square root of 2081917500 is about 45628.0341456872. The cubic root of 2081917500 is about 1276.8929973727.

The spelling of 2081917500 in words is "two billion, eighty-one million, nine hundred seventeen thousand, five hundred".