2001917190 has 128 divisors (see below), whose sum is σ = 6073482240. Its totient is φ = 410946048.

The previous prime is 2001917173. The next prime is 2001917191. The reversal of 2001917190 is 917191002.

It is a super-2 number, since 2×2001917190² = 8015344871234992200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2001917191) 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, 91101 + ... + 110919.

It is an arithmetic number, because the mean of its divisors is an integer number (47449080).

Almost surely, 2^2001917190 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2001917190, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3036741120).

2001917190 is an abundant number, since it is smaller than the sum of its proper divisors (4071565050).

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

2001917190 is a wasteful number, since it uses less digits than its factorization.

2001917190 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19886.

The product of its (nonzero) digits is 1134, while the sum is 30.

The square root of 2001917190 is about 44742.7892514537. The cubic root of 2001917190 is about 1260.3235059977.

The spelling of 2001917190 in words is "two billion, one million, nine hundred seventeen thousand, one hundred ninety".