1020220020 has 72 divisors (see below), whose sum is σ = 3097471104. Its totient is φ = 271812288.

The previous prime is 1020220001. The next prime is 1020220043. The reversal of 1020220020 is 200220201.

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 = 1020219984 and 1020220011.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 287497 + ... + 291023.

It is an arithmetic number, because the mean of its divisors is an integer number (43020432).

Almost surely, 2^1020220020 is an apocalyptic number.

1020220020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1020220020 is an abundant number, since it is smaller than the sum of its proper divisors (2077251084).

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

1020220020 is a wasteful number, since it uses less digits than its factorization.

1020220020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5149 (or 5144 counting only the distinct ones).

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

The square root of 1020220020 is about 31940.8832063235. The cubic root of 1020220020 is about 1006.6950825032.

Adding to 1020220020 its reverse (200220201), we get a palindrome (1220440221).

The spelling of 1020220020 in words is "one billion, twenty million, two hundred twenty thousand, twenty".