2091769918 has 24 divisors (see below), whose sum is σ = 3653865072. Its totient is φ = 895505184.

The previous prime is 2091769909. The next prime is 2091769943. The reversal of 2091769918 is 8199671902.

It is a Smith number, since the sum of its digits (52) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 83730 + ... + 105802.

It is an arithmetic number, because the mean of its divisors is an integer number (152244378).

Almost surely, 2^2091769918 is an apocalyptic number.

2091769918 is a deficient number, since it is larger than the sum of its proper divisors (1562095154).

2091769918 is a wasteful number, since it uses less digits than its factorization.

2091769918 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23056 (or 23049 counting only the distinct ones).

The product of its (nonzero) digits is 489888, while the sum is 52.

The square root of 2091769918 is about 45735.8712391051. The cubic root of 2091769918 is about 1278.9040745594.

The spelling of 2091769918 in words is "two billion, ninety-one million, seven hundred sixty-nine thousand, nine hundred eighteen".