21352001200 has 60 divisors (see below), whose sum is σ = 51327317520. Its totient is φ = 8535950080.

The previous prime is 21352001189. The next prime is 21352001233. The reversal of 21352001200 is 210025312.

It is a Harshad number since it is a multiple of its sum of digits (16).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 736581 + ... + 765019.

It is an arithmetic number, because the mean of its divisors is an integer number (855455292).

Almost surely, 2^21352001200 is an apocalyptic number.

21352001200 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21352001200 is an abundant number, since it is smaller than the sum of its proper divisors (29975316320).

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

21352001200 is a wasteful number, since it uses less digits than its factorization.

21352001200 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30334 (or 30323 counting only the distinct ones).

The product of its (nonzero) digits is 120, while the sum is 16.

Adding to 21352001200 its reverse (210025312), we get a palindrome (21562026512).

The spelling of 21352001200 in words is "twenty-one billion, three hundred fifty-two million, one thousand, two hundred".