2081920917 has 8 divisors (see below), whose sum is σ = 2777163424. Its totient is φ = 1387312848.

The previous prime is 2081920871. The next prime is 2081920957. The reversal of 2081920917 is 7190291802.

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

It is not a de Polignac number, because 2081920917 - 2¹² = 2081916821 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2081920957) 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, 150898 + ... + 164115.

It is an arithmetic number, because the mean of its divisors is an integer number (347145428).

Almost surely, 2^2081920917 is an apocalyptic number.

It is an amenable number.

2081920917 is a deficient number, since it is larger than the sum of its proper divisors (695242507).

2081920917 is a wasteful number, since it uses less digits than its factorization.

2081920917 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 317219.

The product of its (nonzero) digits is 18144, while the sum is 39.

The square root of 2081920917 is about 45628.0715897571. The cubic root of 2081920917 is about 1276.8936959501.

The spelling of 2081920917 in words is "two billion, eighty-one million, nine hundred twenty thousand, nine hundred seventeen".