20001222020 has 48 divisors (see below), whose sum is σ = 45253712448. Its totient is φ = 7381772160.

The previous prime is 20001222013. The next prime is 20001222047. The reversal of 20001222020 is 2022210002.

It is a junction number, because it is equal to n+sod(n) for n = 20001221992 and 20001222010.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 610907 + ... + 642813.

It is an arithmetic number, because the mean of its divisors is an integer number (942785676).

Almost surely, 2^20001222020 is an apocalyptic number.

20001222020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20001222020 is an abundant number, since it is smaller than the sum of its proper divisors (25252490428).

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

20001222020 is a wasteful number, since it uses less digits than its factorization.

20001222020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34340 (or 34338 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 11.

Adding to 20001222020 its reverse (2022210002), we get a palindrome (22023432022).

The spelling of 20001222020 in words is "twenty billion, one million, two hundred twenty-two thousand, twenty".