20001323200 has 84 divisors (see below), whose sum is σ = 50912969040. Its totient is φ = 7724631040.

The previous prime is 20001323179. The next prime is 20001323231. The reversal of 20001323200 is 232310002.

It is a happy 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, 169132 + ... + 261931.

Almost surely, 2^20001323200 is an apocalyptic number.

20001323200 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20001323200 is an abundant number, since it is smaller than the sum of its proper divisors (30911645840).

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

20001323200 is a wasteful number, since it uses less digits than its factorization.

20001323200 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 431114 (or 431099 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 13.

Adding to 20001323200 its reverse (232310002), we get a palindrome (20233633202).

The spelling of 20001323200 in words is "twenty billion, one million, three hundred twenty-three thousand, two hundred".