21450070200 has 192 divisors, whose sum is σ = 71745408000. Its totient is φ = 5270054400.

The previous prime is 21450070193. The next prime is 21450070237. The reversal of 21450070200 is 207005412.

It is a congruent number.

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 47 ways as a sum of consecutive naturals, for example, 4669905 + ... + 4674495.

It is an arithmetic number, because the mean of its divisors is an integer number (373674000).

Almost surely, 2^21450070200 is an apocalyptic number.

21450070200 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21450070200, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (35872704000).

21450070200 is an abundant number, since it is smaller than the sum of its proper divisors (50295337800).

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

21450070200 is a wasteful number, since it uses less digits than its factorization.

21450070200 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5222 (or 5213 counting only the distinct ones).

The product of its (nonzero) digits is 560, while the sum is 21.

Adding to 21450070200 its reverse (207005412), we get a palindrome (21657075612).

The spelling of 21450070200 in words is "twenty-one billion, four hundred fifty million, seventy thousand, two hundred".