20031321310320 has 40 divisors (see below), whose sum is σ = 62097096062736. Its totient is φ = 5341685682688.

The previous prime is 20031321310241. The next prime is 20031321310321. The reversal of 20031321310320 is 2301312313002.

It is a tau number, because it is divible by the number of its divisors (40).

It is a super-3 number, since 3×20031321310320³ (a number of 41 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20031321310321) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 41731919157 + ... + 41731919636.

Almost surely, 2^{20031321310320} is an apocalyptic number.

20031321310320 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20031321310320 is an abundant number, since it is smaller than the sum of its proper divisors (42065774752416).

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

20031321310320 is a wasteful number, since it uses less digits than its factorization.

20031321310320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 83463838809 (or 83463838803 counting only the distinct ones).

The product of its (nonzero) digits is 648, while the sum is 21.

Adding to 20031321310320 its reverse (2301312313002), we get a palindrome (22332633623322).

The spelling of 20031321310320 in words is "twenty trillion, thirty-one billion, three hundred twenty-one million, three hundred ten thousand, three hundred twenty".