2011801845 has 32 divisors (see below), whose sum is σ = 3433166208. Its totient is φ = 1002457088.

The previous prime is 2011801837. The next prime is 2011801849. The reversal of 2011801845 is 5481081102.

It is a happy number.

It is not a de Polignac number, because 2011801845 - 2³ = 2011801837 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2011801849) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 6142 + ... + 63728.

It is an arithmetic number, because the mean of its divisors is an integer number (107286444).

Almost surely, 2^2011801845 is an apocalyptic number.

It is an amenable number.

2011801845 is a deficient number, since it is larger than the sum of its proper divisors (1421364363).

2011801845 is a wasteful number, since it uses less digits than its factorization.

2011801845 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57749.

The product of its (nonzero) digits is 2560, while the sum is 30.

The square root of 2011801845 is about 44853.1141059347. The cubic root of 2011801845 is about 1262.3944233512.

Adding to 2011801845 its reverse (5481081102), we get a palindrome (7492882947).

The spelling of 2011801845 in words is "two billion, eleven million, eight hundred one thousand, eight hundred forty-five".