2185222170020 has 48 divisors (see below), whose sum is σ = 4594723175280. Its totient is φ = 872992733184.

The previous prime is 2185222170017. The next prime is 2185222170031. The reversal of 2185222170020 is 200712225812.

It can be written as a sum of positive squares in 8 ways, for example, as 1575311152996 + 609911017024 = 1255114^2 + 780968^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 176093576 + ... + 176105984.

It is an arithmetic number, because the mean of its divisors is an integer number (95723399485).

Almost surely, 2^{2185222170020} is an apocalyptic number.

2185222170020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2185222170020 is an abundant number, since it is smaller than the sum of its proper divisors (2409501005260).

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

2185222170020 is a wasteful number, since it uses less digits than its factorization.

2185222170020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22752 (or 22750 counting only the distinct ones).

The product of its (nonzero) digits is 8960, while the sum is 32.

Adding to 2185222170020 its reverse (200712225812), we get a palindrome (2385934395832).

The spelling of 2185222170020 in words is "two trillion, one hundred eighty-five billion, two hundred twenty-two million, one hundred seventy thousand, twenty".