2108844781 has 8 divisors (see below), whose sum is σ = 2304923904. Its totient is φ = 1920768960.

The previous prime is 2108844767. The next prime is 2108844797. The reversal of 2108844781 is 1874488012.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2108844781 - 2⁷ = 2108844653 is a prime.

It is a super-2 number, since 2×2108844781² = 8894452620701875922, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2108844701) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2000275 + ... + 2001328.

It is an arithmetic number, because the mean of its divisors is an integer number (288115488).

Almost surely, 2^2108844781 is an apocalyptic number.

It is an amenable number.

2108844781 is a deficient number, since it is larger than the sum of its proper divisors (196079123).

2108844781 is a wasteful number, since it uses less digits than its factorization.

2108844781 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4001651.

The product of its (nonzero) digits is 114688, while the sum is 43.

The square root of 2108844781 is about 45922.1600210617. The cubic root of 2108844781 is about 1282.3744947970.

The spelling of 2108844781 in words is "two billion, one hundred eight million, eight hundred forty-four thousand, seven hundred eighty-one".