21010002020304 has 160 divisors (see below), whose sum is σ = 62334263923200. Its totient is φ = 6030810938880.

The previous prime is 21010002020251. The next prime is 21010002020309. The reversal of 21010002020304 is 40302020001012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21010002020309) 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, 81059587 + ... + 81318365.

It is an arithmetic number, because the mean of its divisors is an integer number (389589149520).

Almost surely, 2^{21010002020304} is an apocalyptic number.

21010002020304 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21010002020304, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31167131961600).

21010002020304 is an abundant number, since it is smaller than the sum of its proper divisors (41324261902896).

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

21010002020304 is a wasteful number, since it uses less digits than its factorization.

21010002020304 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 266913 (or 266907 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 15.

Adding to 21010002020304 its reverse (40302020001012), we get a palindrome (61312022021316).

The spelling of 21010002020304 in words is "twenty-one trillion, ten billion, two million, twenty thousand, three hundred four".