1866872050220 has 48 divisors (see below), whose sum is σ = 3980424284928. Its totient is φ = 735379450560.

The previous prime is 1866872050171. The next prime is 1866872050229. The reversal of 1866872050220 is 220502786681.

It is a super-2 number, since 2×1866872050220² (a number of 25 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1866872050229) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1291814 + ... + 2324333.

It is an arithmetic number, because the mean of its divisors is an integer number (82925505936).

Almost surely, 2^{1866872050220} is an apocalyptic number.

1866872050220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1866872050220 is an abundant number, since it is smaller than the sum of its proper divisors (2113552234708).

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

1866872050220 is a wasteful number, since it uses less digits than its factorization.

1866872050220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3616550 (or 3616548 counting only the distinct ones).

The product of its (nonzero) digits is 645120, while the sum is 47.

The spelling of 1866872050220 in words is "one trillion, eight hundred sixty-six billion, eight hundred seventy-two million, fifty thousand, two hundred twenty".