20020011220 has 24 divisors (see below), whose sum is σ = 45864026208. Its totient is φ = 7280004000.

The previous prime is 20020011211. The next prime is 20020011229. The reversal of 20020011220 is 2211002002.

It is an interprime number because it is at equal distance from previous prime (20020011211) and next prime (20020011229).

It is a Harshad number since it is a multiple of its sum of digits (10).

It is a junction number, because it is equal to n+sod(n) for n = 20020011197 and 20020011206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20020011229) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 45499806 + ... + 45500245.

It is an arithmetic number, because the mean of its divisors is an integer number (1911001092).

Almost surely, 2^20020011220 is an apocalyptic number.

20020011220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20020011220 is an abundant number, since it is smaller than the sum of its proper divisors (25844014988).

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

20020011220 is a wasteful number, since it uses less digits than its factorization.

20020011220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 91000071 (or 91000069 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 10.

Adding to 20020011220 its reverse (2211002002), we get a palindrome (22231013222).

The spelling of 20020011220 in words is "twenty billion, twenty million, eleven thousand, two hundred twenty".