2061801836 has 6 divisors (see below), whose sum is σ = 3608153220. Its totient is φ = 1030900916.

The previous prime is 2061801829. The next prime is 2061801839. The reversal of 2061801836 is 6381081602.

It is a junction number, because it is equal to n+sod(n) for n = 2061801796 and 2061801805.

It is not an unprimeable number, because it can be changed into a prime (2061801839) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 257725226 + ... + 257725233.

It is an arithmetic number, because the mean of its divisors is an integer number (601358870).

Almost surely, 2^2061801836 is an apocalyptic number.

It is an amenable number.

2061801836 is a deficient number, since it is larger than the sum of its proper divisors (1546351384).

2061801836 is a wasteful number, since it uses less digits than its factorization.

2061801836 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 515450463 (or 515450461 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 35.

The square root of 2061801836 is about 45407.0681282111. The cubic root of 2061801836 is about 1272.7671978378.

The spelling of 2061801836 in words is "two billion, sixty-one million, eight hundred one thousand, eight hundred thirty-six".