2091854442 has 16 divisors (see below), whose sum is σ = 4186935360. Its totient is φ = 696747072.

The previous prime is 2091854389. The next prime is 2091854447. The reversal of 2091854442 is 2444581902.

It is a self number, because there is not a number n which added to its sum of digits gives 2091854442.

It is not an unprimeable number, because it can be changed into a prime (2091854447) 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, 125967 + ... + 141602.

It is an arithmetic number, because the mean of its divisors is an integer number (261683460).

Almost surely, 2^2091854442 is an apocalyptic number.

2091854442 is an abundant number, since it is smaller than the sum of its proper divisors (2095080918).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2091854442 is a wasteful number, since it uses less digits than its factorization.

2091854442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 268877.

The product of its (nonzero) digits is 92160, while the sum is 39.

The square root of 2091854442 is about 45736.7952747020. The cubic root of 2091854442 is about 1278.9213002640.

The spelling of 2091854442 in words is "two billion, ninety-one million, eight hundred fifty-four thousand, four hundred forty-two".