20800323683172 has 144 divisors (see below), whose sum is σ = 60462153743040. Its totient is φ = 6132773088000.

The previous prime is 20800323683149. The next prime is 20800323683177. The reversal of 20800323683172 is 27138632300802.

20800323683172 is a `hidden beast` number, since 2 + 0 + 8 + 0 + 0 + 323 + 6 + 8 + 317 + 2 = 666.

It is not an unprimeable number, because it can be changed into a prime (20800323683177) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 4768329 + ... + 8021072.

It is an arithmetic number, because the mean of its divisors is an integer number (419876067660).

Almost surely, 2^{20800323683172} is an apocalyptic number.

20800323683172 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

20800323683172 is an abundant number, since it is smaller than the sum of its proper divisors (39661830059868).

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

20800323683172 is a wasteful number, since it uses less digits than its factorization.

20800323683172 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12789499 (or 12789454 counting only the distinct ones).

The product of its (nonzero) digits is 580608, while the sum is 45.

Adding to 20800323683172 its reverse (27138632300802), we get a palindrome (47938955983974).

The spelling of 20800323683172 in words is "twenty trillion, eight hundred billion, three hundred twenty-three million, six hundred eighty-three thousand, one hundred seventy-two".