1020620020 has 36 divisors (see below), whose sum is σ = 2493231300. Its totient is φ = 349926528.

The previous prime is 1020619969. The next prime is 1020620053. The reversal of 1020620020 is 200260201.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 500506384 + 520113636 = 22372^2 + 22806^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 519745 + ... + 521704.

It is an arithmetic number, because the mean of its divisors is an integer number (69256425).

Almost surely, 2^1020620020 is an apocalyptic number.

1020620020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1020620020 is an abundant number, since it is smaller than the sum of its proper divisors (1472611280).

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

1020620020 is a wasteful number, since it uses less digits than its factorization.

1020620020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1041472 (or 1041463 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 13.

The square root of 1020620020 is about 31947.1441603158. The cubic root of 1020620020 is about 1006.8266310614.

Adding to 1020620020 its reverse (200260201), we get a palindrome (1220880221).

The spelling of 1020620020 in words is "one billion, twenty million, six hundred twenty thousand, twenty".