20012320422020 has 24 divisors (see below), whose sum is σ = 42088318490904. Its totient is φ = 7993033767936.

The previous prime is 20012320422011. The next prime is 20012320422023. The reversal of 20012320422020 is 2022402321002.

It can be written as a sum of positive squares in 4 ways, for example, as 1996998575104 + 18015321846916 = 1413152^2 + 4244446^2 .

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 20012320421983 and 20012320422001.

It is not an unprimeable number, because it can be changed into a prime (20012320422023) 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, 743386259 + ... + 743413178.

It is an arithmetic number, because the mean of its divisors is an integer number (1753679937121).

Almost surely, 2^{20012320422020} is an apocalyptic number.

20012320422020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20012320422020 is an abundant number, since it is smaller than the sum of its proper divisors (22075998068884).

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

20012320422020 is a wasteful number, since it uses less digits than its factorization.

20012320422020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1486800119 (or 1486800117 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 20.

Adding to 20012320422020 its reverse (2022402321002), we get a palindrome (22034722743022).

The spelling of 20012320422020 in words is "twenty trillion, twelve billion, three hundred twenty million, four hundred twenty-two thousand, twenty".