20001322020 has 24 divisors (see below), whose sum is σ = 56003701824. Its totient is φ = 5333685856.

The previous prime is 20001322013. The next prime is 20001322037. The reversal of 20001322020 is 2022310002.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a junction number, because it is equal to n+sod(n) for n = 20001321987 and 20001322005.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 166677624 + ... + 166677743.

It is an arithmetic number, because the mean of its divisors is an integer number (2333487576).

Almost surely, 2^20001322020 is an apocalyptic number.

20001322020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20001322020 is an abundant number, since it is smaller than the sum of its proper divisors (36002379804).

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

20001322020 is a wasteful number, since it uses less digits than its factorization.

20001322020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 333355379 (or 333355377 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 12.

Adding to 20001322020 its reverse (2022310002), we get a palindrome (22023632022).

The spelling of 20001322020 in words is "twenty billion, one million, three hundred twenty-two thousand, twenty".