21237325200 has 1080 divisors, whose sum is σ = 96025395648. Its totient is φ = 4480842240.

The previous prime is 21237325189. The next prime is 21237325223. The reversal of 21237325200 is 252373212.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (1080).

It is a Harshad number since it is a multiple of its sum of digits (27).

It is an unprimeable number.

It is a polite number, since it can be written in 215 ways as a sum of consecutive naturals, for example, 1633640394 + ... + 1633640406.

Almost surely, 2^21237325200 is an apocalyptic number.

21237325200 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 21237325200, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (48012697824).

21237325200 is an abundant number, since it is smaller than the sum of its proper divisors (74788070448).

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

21237325200 is an frugal number, since it uses more digits than its factorization.

21237325200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81 (or 30 counting only the distinct ones).

The product of its (nonzero) digits is 5040, while the sum is 27.

Adding to 21237325200 its reverse (252373212), we get a palindrome (21489698412).

The spelling of 21237325200 in words is "twenty-one billion, two hundred thirty-seven million, three hundred twenty-five thousand, two hundred".