1020010020 has 96 divisors (see below), whose sum is σ = 2913563520. Its totient is φ = 266572800.

The previous prime is 1020010007. The next prime is 1020010031. The reversal of 1020010020 is 200100201.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (6).

It is a super Niven number, because it is divisible the sum of any subset of its (nonzero) digits.

It is a junction number, because it is equal to n+sod(n) for n = 1020009990 and 1020010008.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 783370 + ... + 784670.

It is an arithmetic number, because the mean of its divisors is an integer number (30349620).

Almost surely, 2^1020010020 is an apocalyptic number.

1020010020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1020010020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1456781760).

1020010020 is an abundant number, since it is smaller than the sum of its proper divisors (1893553500).

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

1020010020 is a wasteful number, since it uses less digits than its factorization.

1020010020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1565 (or 1563 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 6.

The square root of 1020010020 is about 31937.5957141423. The cubic root of 1020010020 is about 1006.6260057453.

Adding to 1020010020 its reverse (200100201), we get a palindrome (1220110221).

The spelling of 1020010020 in words is "one billion, twenty million, ten thousand, twenty".