820220208200 has 48 divisors (see below), whose sum is σ = 1917665766000. Its totient is φ = 326255174720.

The previous prime is 820220208187. The next prime is 820220208277. The reversal of 820220208200 is 2802022028.

It is a super-2 number, since 2×820220208200² (a number of 25 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 820220208200.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 11419790 + ... + 11491389.

It is an arithmetic number, because the mean of its divisors is an integer number (39951370125).

Almost surely, 2^820220208200 is an apocalyptic number.

It is an amenable number.

820220208200 is an abundant number, since it is smaller than the sum of its proper divisors (1097445557800).

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

820220208200 is a wasteful number, since it uses less digits than its factorization.

820220208200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22911374 (or 22911365 counting only the distinct ones).

The product of its (nonzero) digits is 2048, while the sum is 26.

The spelling of 820220208200 in words is "eight hundred twenty billion, two hundred twenty million, two hundred eight thousand, two hundred".