20000021020002 has 192 divisors, whose sum is σ = 46737106790400. Its totient is φ = 6158661949440.

The previous prime is 20000021019943. The next prime is 20000021020027. The reversal of 20000021020002 is 20002012000002.

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 95 ways as a sum of consecutive naturals, for example, 3818981728 + ... + 3818986964.

It is an arithmetic number, because the mean of its divisors is an integer number (243422431200).

Almost surely, 2^{20000021020002} is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20000021020002, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23368553395200).

20000021020002 is an abundant number, since it is smaller than the sum of its proper divisors (26737085770398).

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

20000021020002 is a wasteful number, since it uses less digits than its factorization.

20000021020002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6241 (or 6238 counting only the distinct ones).

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

Adding to 20000021020002 its reverse (20002012000002), we get a palindrome (40002033020004).

The spelling of 20000021020002 in words is "twenty trillion, twenty-one million, twenty thousand, two".