21003200040304 has 160 divisors (see below), whose sum is σ = 45533935641600. Its totient is φ = 9334374567936.

The previous prime is 21003200040269. The next prime is 21003200040359. The reversal of 21003200040304 is 40304000230012.

It is a super-2 number, since 2×21003200040304² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 155600587 + ... + 155735509.

It is an arithmetic number, because the mean of its divisors is an integer number (284587097760).

Almost surely, 2^{21003200040304} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21003200040304, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22766967820800).

21003200040304 is an abundant number, since it is smaller than the sum of its proper divisors (24530735601296).

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

21003200040304 is a wasteful number, since it uses less digits than its factorization.

21003200040304 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 135287 (or 135281 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 19.

Adding to 21003200040304 its reverse (40304000230012), we get a palindrome (61307200270316).

The spelling of 21003200040304 in words is "twenty-one trillion, three billion, two hundred million, forty thousand, three hundred four".