2091887974 has 32 divisors (see below), whose sum is σ = 3454721280. Its totient is φ = 942112800.

The previous prime is 2091887957. The next prime is 2091887977. The reversal of 2091887974 is 4797881902.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2091887977) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1365589 + ... + 1367119.

It is an arithmetic number, because the mean of its divisors is an integer number (107960040).

Almost surely, 2^2091887974 is an apocalyptic number.

2091887974 is a deficient number, since it is larger than the sum of its proper divisors (1362833306).

2091887974 is a wasteful number, since it uses less digits than its factorization.

2091887974 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2076.

The product of its (nonzero) digits is 2032128, while the sum is 55.

The square root of 2091887974 is about 45737.1618489823. The cubic root of 2091887974 is about 1278.9281338433.

The spelling of 2091887974 in words is "two billion, ninety-one million, eight hundred eighty-seven thousand, nine hundred seventy-four".