1002000020020 has 24 divisors (see below), whose sum is σ = 2114773920000. Its totient is φ = 398785936032.

The previous prime is 1002000019997. The next prime is 1002000020123. The reversal of 1002000020020 is 200200002001.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 1002000019985 and 1002000020012.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 125875420 + ... + 125883379.

It is an arithmetic number, because the mean of its divisors is an integer number (88115580000).

Almost surely, 2^{1002000020020} is an apocalyptic number.

1002000020020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1002000020020 is an abundant number, since it is smaller than the sum of its proper divisors (1112773899980).

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

1002000020020 is a wasteful number, since it uses less digits than its factorization.

1002000020020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 251759007 (or 251759005 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 7.

Adding to 1002000020020 its reverse (200200002001), we get a palindrome (1202200022021).

The spelling of 1002000020020 in words is "one trillion, two billion, twenty thousand, twenty".