2181844022 has 16 divisors (see below), whose sum is σ = 3466361952. Its totient is φ = 1026430080.

The previous prime is 2181843977. The next prime is 2181844031. The reversal of 2181844022 is 2204481812.

It is a self number, because there is not a number n which added to its sum of digits gives 2181844022.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 128447 + ... + 144437.

It is an arithmetic number, because the mean of its divisors is an integer number (216647622).

Almost surely, 2^2181844022 is an apocalyptic number.

2181844022 is a deficient number, since it is larger than the sum of its proper divisors (1284517930).

2181844022 is a wasteful number, since it uses less digits than its factorization.

2181844022 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20023.

The product of its (nonzero) digits is 8192, while the sum is 32.

The square root of 2181844022 is about 46710.2132514935. The cubic root of 2181844022 is about 1297.0037547743.

The spelling of 2181844022 in words is "two billion, one hundred eighty-one million, eight hundred forty-four thousand, twenty-two".