20321211200 has 84 divisors (see below), whose sum is σ = 50180687040. Its totient is φ = 8099581440.

The previous prime is 20321211193. The next prime is 20321211247. The reversal of 20321211200 is 211212302.

It is a happy number.

It is a congruent number.

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, 430361 + ... + 475239.

Almost surely, 2^20321211200 is an apocalyptic number.

20321211200 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 20321211200, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25090343520).

20321211200 is an abundant number, since it is smaller than the sum of its proper divisors (29859475840).

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

20321211200 is a wasteful number, since it uses less digits than its factorization.

20321211200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45184 (or 45169 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 14.

Adding to 20321211200 its reverse (211212302), we get a palindrome (20532423502).

It can be divided in two parts, 203212 and 11200, that added together give a palindrome (214412).

The spelling of 20321211200 in words is "twenty billion, three hundred twenty-one million, two hundred eleven thousand, two hundred".