20731203445000 has 160 divisors (see below), whose sum is σ = 49655937513600. Its totient is φ = 8107987232000.

The previous prime is 20731203444977. The next prime is 20731203445027. The reversal of 20731203445000 is 54430213702.

It is a happy number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 239421714 + ... + 239508286.

It is an arithmetic number, because the mean of its divisors is an integer number (310349609460).

Almost surely, 2^{20731203445000} is an apocalyptic number.

20731203445000 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 20731203445000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24827968756800).

20731203445000 is an abundant number, since it is smaller than the sum of its proper divisors (28924734068600).

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

20731203445000 is a wasteful number, since it uses less digits than its factorization.

20731203445000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 87665 (or 87646 counting only the distinct ones).

The product of its (nonzero) digits is 20160, while the sum is 31.

Adding to 20731203445000 its reverse (54430213702), we get a palindrome (20785633658702).

The spelling of 20731203445000 in words is "twenty trillion, seven hundred thirty-one billion, two hundred three million, four hundred forty-five thousand".