20021020002 has 24 divisors (see below), whose sum is σ = 43569981936. Its totient is φ = 6644272536.

The previous prime is 20021019989. The next prime is 20021020027. The reversal of 20021020002 is 20002012002.

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

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, 2445868 + ... + 2454039.

It is an arithmetic number, because the mean of its divisors is an integer number (1815415914).

Almost surely, 2^20021020002 is an apocalyptic number.

20021020002 is an abundant number, since it is smaller than the sum of its proper divisors (23548961934).

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

20021020002 is a wasteful number, since it uses less digits than its factorization.

20021020002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4900142 (or 4900139 counting only the distinct ones).

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

Adding to 20021020002 its reverse (20002012002), we get a palindrome (40023032004).

The spelling of 20021020002 in words is "twenty billion, twenty-one million, twenty thousand, two".