20321031033020 has 12 divisors (see below), whose sum is σ = 42674165169384. Its totient is φ = 8128412413200.

The previous prime is 20321031033011. The next prime is 20321031033029. The reversal of 20321031033020 is 2033013012302.

It is an interprime number because it is at equal distance from previous prime (20321031033011) and next prime (20321031033029).

It is a Harshad number since it is a multiple of its sum of digits (20), and also a Moran number because the ratio is a prime number: 1016051551651 = 20321031033020 / (2 + 0 + 3 + 2 + 1 + 0 + 3 + 1 + 0 + 3 + 3 + 0 + 2 + 0).

It is a junction number, because it is equal to n+sod(n) for n = 20321031032983 and 20321031033001.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20321031033029) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 508025775806 + ... + 508025775845.

It is an arithmetic number, because the mean of its divisors is an integer number (3556180430782).

Almost surely, 2^{20321031033020} is an apocalyptic number.

20321031033020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20321031033020 is an abundant number, since it is smaller than the sum of its proper divisors (22353134136364).

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

20321031033020 is a wasteful number, since it uses less digits than its factorization.

20321031033020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1016051551660 (or 1016051551658 counting only the distinct ones).

The product of its (nonzero) digits is 648, while the sum is 20.

Adding to 20321031033020 its reverse (2033013012302), we get a palindrome (22354044045322).

The spelling of 20321031033020 in words is "twenty trillion, three hundred twenty-one billion, thirty-one million, thirty-three thousand, twenty".