2001861835 has 16 divisors (see below), whose sum is σ = 2455437312. Its totient is φ = 1566079200.

The previous prime is 2001861803. The next prime is 2001861839. The reversal of 2001861835 is 5381681002.

It is not a de Polignac number, because 2001861835 - 2⁵ = 2001861803 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2001861835.

It is not an unprimeable number, because it can be changed into a prime (2001861839) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 342790 + ... + 348580.

It is an arithmetic number, because the mean of its divisors is an integer number (153464832).

Almost surely, 2^2001861835 is an apocalyptic number.

2001861835 is a deficient number, since it is larger than the sum of its proper divisors (453575477).

2001861835 is a wasteful number, since it uses less digits than its factorization.

2001861835 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7314.

The product of its (nonzero) digits is 11520, while the sum is 34.

The square root of 2001861835 is about 44742.1706558812. The cubic root of 2001861835 is about 1260.3118894915.

The spelling of 2001861835 in words is "two billion, one million, eight hundred sixty-one thousand, eight hundred thirty-five".