20020221020 has 48 divisors (see below), whose sum is σ = 45270096480. Its totient is φ = 7409270784.

The previous prime is 20020220999. The next prime is 20020221029. The reversal of 20020221020 is 2012202002.

It is a junction number, because it is equal to n+sod(n) for n = 20020220992 and 20020221010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20020221029) 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, 478949 + ... + 519068.

It is an arithmetic number, because the mean of its divisors is an integer number (943127010).

Almost surely, 2^20020221020 is an apocalyptic number.

20020221020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20020221020 is an abundant number, since it is smaller than the sum of its proper divisors (25249875460).

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

20020221020 is a wasteful number, since it uses less digits than its factorization.

20020221020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 998102 (or 998100 counting only the distinct ones).

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

Adding to 20020221020 its reverse (2012202002), we get a palindrome (22032423022).

The spelling of 20020221020 in words is "twenty billion, twenty million, two hundred twenty-one thousand, twenty".