2221858183820 has 48 divisors (see below), whose sum is σ = 5214223306656. Its totient is φ = 788242368000.

The previous prime is 2221858183801. The next prime is 2221858183843. The reversal of 2221858183820 is 283818581222.

It is a Smith number, since the sum of its digits (50) coincides with the sum of the digits of its prime factors.

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, 123153851 + ... + 123171890.

It is an arithmetic number, because the mean of its divisors is an integer number (108629652222).

Almost surely, 2^{2221858183820} is an apocalyptic number.

2221858183820 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2221858183820 is an abundant number, since it is smaller than the sum of its proper divisors (2992365122836).

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

2221858183820 is a wasteful number, since it uses less digits than its factorization.

2221858183820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 246325802 (or 246325800 counting only the distinct ones).

The product of its (nonzero) digits is 983040, while the sum is 50.

The spelling of 2221858183820 in words is "two trillion, two hundred twenty-one billion, eight hundred fifty-eight million, one hundred eighty-three thousand, eight hundred twenty".