20321223200 has 36 divisors (see below), whose sum is σ = 49609188090. Its totient is φ = 8128488960.

The previous prime is 20321223193. The next prime is 20321223217. The reversal of 20321223200 is 232212302.

It can be written as a sum of positive squares in 3 ways, for example, as 10521015184 + 9800208016 = 102572^2 + 98996^2 .

It is a super-2 number, since 2×20321223200² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 12699965 + ... + 12701564.

Almost surely, 2^20321223200 is an apocalyptic number.

20321223200 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20321223200 is an abundant number, since it is smaller than the sum of its proper divisors (29287964890).

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

20321223200 is a wasteful number, since it uses less digits than its factorization.

20321223200 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25401549 (or 25401536 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 17.

Adding to 20321223200 its reverse (232212302), we get a palindrome (20553435502).

The spelling of 20321223200 in words is "twenty billion, three hundred twenty-one million, two hundred twenty-three thousand, two hundred".