20321440143020 has 12 divisors (see below), whose sum is σ = 42675024300384. Its totient is φ = 8128576057200.

The previous prime is 20321440142981. The next prime is 20321440143023. The reversal of 20321440143020 is 2034104412302.

It is not an unprimeable number, because it can be changed into a prime (20321440143023) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 508036003556 + ... + 508036003595.

It is an arithmetic number, because the mean of its divisors is an integer number (3556252025032).

Almost surely, 2^{20321440143020} is an apocalyptic number.

20321440143020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20321440143020 is an abundant number, since it is smaller than the sum of its proper divisors (22353584157364).

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

20321440143020 is a wasteful number, since it uses less digits than its factorization.

20321440143020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1016072007160 (or 1016072007158 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 26.

Adding to 20321440143020 its reverse (2034104412302), we get a palindrome (22355544555322).

The spelling of 20321440143020 in words is "twenty trillion, three hundred twenty-one billion, four hundred forty million, one hundred forty-three thousand, twenty".