1020020020020 has 96 divisors (see below), whose sum is σ = 3173787993600. Its totient is φ = 271971706752.

The previous prime is 1020020019947. The next prime is 1020020020021. The reversal of 1020020020020 is 200200200201.

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

1020020020020 is a modest number, since divided by 20020020 gives 1020 as remainder.

It is a junction number, because it is equal to n+sod(n) for n = 1020020019984 and 1020020020011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1020020020021) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4417477 + ... + 4642643.

It is an arithmetic number, because the mean of its divisors is an integer number (33060291600).

Almost surely, 2^{1020020020020} is an apocalyptic number.

1020020020020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1020020020020 is an abundant number, since it is smaller than the sum of its proper divisors (2153767973580).

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

1020020020020 is a wasteful number, since it uses less digits than its factorization.

1020020020020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 233574 (or 233566 counting only the distinct ones).

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

Adding to 1020020020020 its reverse (200200200201), we get a palindrome (1220220220221).

The spelling of 1020020020020 in words is "one trillion, twenty billion, twenty million, twenty thousand, twenty".