200120555400 has 48 divisors (see below), whose sum is σ = 620373723600. Its totient is φ = 53365481280.

The previous prime is 200120555359. The next prime is 200120555417. The reversal of 200120555400 is 4555021002.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (24).

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, 166766530 + ... + 166767729.

It is an arithmetic number, because the mean of its divisors is an integer number (12924452575).

Almost surely, 2^200120555400 is an apocalyptic number.

200120555400 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

200120555400 is an abundant number, since it is smaller than the sum of its proper divisors (420253168200).

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

200120555400 is a wasteful number, since it uses less digits than its factorization.

200120555400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 333534278 (or 333534269 counting only the distinct ones).

The product of its (nonzero) digits is 2000, while the sum is 24.

Adding to 200120555400 its reverse (4555021002), we get a palindrome (204675576402).

The spelling of 200120555400 in words is "two hundred billion, one hundred twenty million, five hundred fifty-five thousand, four hundred".