1020022020 has 36 divisors (see below), whose sum is σ = 3094067340. Its totient is φ = 272005824.

The previous prime is 1020022019. The next prime is 1020022021. The reversal of 1020022020 is 202200201.

It is an interprime number because it is at equal distance from previous prime (1020022019) and next prime (1020022021).

It can be written as a sum of positive squares in 2 ways, for example, as 473584644 + 546437376 = 21762^2 + 23376^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a junction number, because it is equal to n+sod(n) for n = 1020021993 and 1020022011.

It is not an unprimeable number, because it can be changed into a prime (1020022021) 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 11 ways as a sum of consecutive naturals, for example, 2833215 + ... + 2833574.

It is an arithmetic number, because the mean of its divisors is an integer number (85946315).

Almost surely, 2^1020022020 is an apocalyptic number.

1020022020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1020022020 is an abundant number, since it is smaller than the sum of its proper divisors (2074045320).

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

1020022020 is a wasteful number, since it uses less digits than its factorization.

1020022020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5666804 (or 5666799 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 9.

The square root of 1020022020 is about 31937.7835799543. The cubic root of 1020022020 is about 1006.6299532440.

Adding to 1020022020 its reverse (202200201), we get a palindrome (1222222221).

The spelling of 1020022020 in words is "one billion, twenty million, twenty-two thousand, twenty".