20031224321020 has 48 divisors (see below), whose sum is σ = 45904677856128. Its totient is φ = 7281706340160.

The previous prime is 20031224320981. The next prime is 20031224321021. The reversal of 20031224321020 is 2012342213002.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is a junction number, because it is equal to n+sod(n) for n = 20031224320982 and 20031224321000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20031224321021) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 14168922 + ... + 15518401.

It is an arithmetic number, because the mean of its divisors is an integer number (956347455336).

Almost surely, 2^{20031224321020} is an apocalyptic number.

20031224321020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20031224321020 is an abundant number, since it is smaller than the sum of its proper divisors (25873453535108).

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

20031224321020 is a wasteful number, since it uses less digits than its factorization.

20031224321020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29690410 (or 29690408 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 22.

Adding to 20031224321020 its reverse (2012342213002), we get a palindrome (22043566534022).

The spelling of 20031224321020 in words is "twenty trillion, thirty-one billion, two hundred twenty-four million, three hundred twenty-one thousand, twenty".