1002012020 has 48 divisors (see below), whose sum is σ = 2198689920. Its totient is φ = 382859136.

The previous prime is 1002012017. The next prime is 1002012071. The reversal of 1002012020 is 202102001.

It is a junction number, because it is equal to n+sod(n) for n = 1002011989 and 1002012007.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 670394 + ... + 671886.

It is an arithmetic number, because the mean of its divisors is an integer number (45806040).

Almost surely, 2^1002012020 is an apocalyptic number.

1002012020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1002012020 is an abundant number, since it is smaller than the sum of its proper divisors (1196677900).

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

1002012020 is a wasteful number, since it uses less digits than its factorization.

1002012020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2984 (or 2982 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 8.

The square root of 1002012020 is about 31654.5734452385. The cubic root of 1002012020 is about 1000.6702240327.

Adding to 1002012020 its reverse (202102001), we get a palindrome (1204114021).

The spelling of 1002012020 in words is "one billion, two million, twelve thousand, twenty".