2091043684 has 12 divisors (see below), whose sum is σ = 3659806444. Its totient is φ = 1045384704.

The previous prime is 2091043679. The next prime is 2091043687. The reversal of 2091043684 is 4863401902.

It can be written as a sum of positive squares in 2 ways, for example, as 1484406784 + 606636900 = 38528^2 + 24630^2 .

It is not an unprimeable number, because it can be changed into a prime (2091043687) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5032 + ... + 64864.

Almost surely, 2^2091043684 is an apocalyptic number.

It is an amenable number.

2091043684 is a deficient number, since it is larger than the sum of its proper divisors (1568762760).

2091043684 is a wasteful number, since it uses less digits than its factorization.

2091043684 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 68574 (or 68572 counting only the distinct ones).

The product of its (nonzero) digits is 41472, while the sum is 37.

The square root of 2091043684 is about 45727.9311143638. The cubic root of 2091043684 is about 1278.7560514074.

The spelling of 2091043684 in words is "two billion, ninety-one million, forty-three thousand, six hundred eighty-four".