1820022222004 has 12 divisors (see below), whose sum is σ = 3640044444064. Its totient is φ = 780009523704.

The previous prime is 1820022221999. The next prime is 1820022222017. The reversal of 1820022222004 is 4002222200281.

1820022222004 is an admirable number.

It is a self number, because there is not a number n which added to its sum of digits gives 1820022222004.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 32500396794 + ... + 32500396849.

Almost surely, 2^{1820022222004} is an apocalyptic number.

1820022222004 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

1820022222004 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

1820022222004 is a wasteful number, since it uses less digits than its factorization.

1820022222004 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65000793654 (or 65000793652 counting only the distinct ones).

The product of its (nonzero) digits is 2048, while the sum is 25.

Adding to 1820022222004 its reverse (4002222200281), we get a palindrome (5822244422285).

The spelling of 1820022222004 in words is "one trillion, eight hundred twenty billion, twenty-two million, two hundred twenty-two thousand, four".