2091974964 has 24 divisors (see below), whose sum is σ = 4882032288. Its totient is φ = 697216800.

The previous prime is 2091974909. The next prime is 2091974987. The reversal of 2091974964 is 4694791902.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 118939 + ... + 135389.

It is an arithmetic number, because the mean of its divisors is an integer number (203418012).

Almost surely, 2^2091974964 is an apocalyptic number.

It is an amenable number.

2091974964 is an abundant number, since it is smaller than the sum of its proper divisors (2790057324).

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

2091974964 is a wasteful number, since it uses less digits than its factorization.

2091974964 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27055 (or 27053 counting only the distinct ones).

The product of its (nonzero) digits is 979776, while the sum is 51.

The square root of 2091974964 is about 45738.1128163373. The cubic root of 2091974964 is about 1278.9458614364.

The spelling of 2091974964 in words is "two billion, ninety-one million, nine hundred seventy-four thousand, nine hundred sixty-four".