21730884200 has 48 divisors (see below), whose sum is σ = 51699310080. Its totient is φ = 8490202560.

The previous prime is 21730884167. The next prime is 21730884221. The reversal of 21730884200 is 248803712.

It is a super-2 number, since 2×21730884200² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1254824 + ... + 1272023.

It is an arithmetic number, because the mean of its divisors is an integer number (1077068960).

Almost surely, 2^21730884200 is an apocalyptic number.

21730884200 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21730884200 is an abundant number, since it is smaller than the sum of its proper divisors (29968425880).

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

21730884200 is a wasteful number, since it uses less digits than its factorization.

21730884200 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2526906 (or 2526897 counting only the distinct ones).

The product of its (nonzero) digits is 21504, while the sum is 35.

The spelling of 21730884200 in words is "twenty-one billion, seven hundred thirty million, eight hundred eighty-four thousand, two hundred".