2051805836 has 12 divisors (see below), whose sum is σ = 3591399840. Its totient is φ = 1025691600.

The previous prime is 2051805823. The next prime is 2051805851. The reversal of 2051805836 is 6385081502.

It is a self number, because there is not a number n which added to its sum of digits gives 2051805836.

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 3 ways as a sum of consecutive naturals, for example, 29876 + ... + 70683.

It is an arithmetic number, because the mean of its divisors is an integer number (299283320).

Almost surely, 2^2051805836 is an apocalyptic number.

It is an amenable number.

2051805836 is a deficient number, since it is larger than the sum of its proper divisors (1539594004).

2051805836 is a wasteful number, since it uses less digits than its factorization.

2051805836 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 105664 (or 105662 counting only the distinct ones).

The product of its (nonzero) digits is 57600, while the sum is 38.

The square root of 2051805836 is about 45296.8634234204. The cubic root of 2051805836 is about 1270.7069938733.

The spelling of 2051805836 in words is "two billion, fifty-one million, eight hundred five thousand, eight hundred thirty-six".