2091345490 has 32 divisors (see below), whose sum is σ = 4073259456. Its totient is φ = 768519360.

The previous prime is 2091345479. The next prime is 2091345493. The reversal of 2091345490 is 945431902.

It is a Smith number, since the sum of its digits (37) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (2091345493) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10692 + ... + 65551.

It is an arithmetic number, because the mean of its divisors is an integer number (127289358).

Almost surely, 2^2091345490 is an apocalyptic number.

2091345490 is a deficient number, since it is larger than the sum of its proper divisors (1981913966).

2091345490 is a wasteful number, since it uses less digits than its factorization.

2091345490 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 76474.

The product of its (nonzero) digits is 38880, while the sum is 37.

The square root of 2091345490 is about 45731.2310133895. The cubic root of 2091345490 is about 1278.8175705562.

The spelling of 2091345490 in words is "two billion, ninety-one million, three hundred forty-five thousand, four hundred ninety".