21236000304 has 40 divisors (see below), whose sum is σ = 54979767280. Its totient is φ = 7063170048.

The previous prime is 21236000299. The next prime is 21236000309. The reversal of 21236000304 is 40300063212.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (21236000299) and next prime (21236000309).

It is a super-2 number, since 2×21236000304² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (21236000309) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 462109 + ... + 505980.

It is an arithmetic number, because the mean of its divisors is an integer number (1374494182).

Almost surely, 2^21236000304 is an apocalyptic number.

21236000304 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

21236000304 is an abundant number, since it is smaller than the sum of its proper divisors (33743766976).

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

21236000304 is a wasteful number, since it uses less digits than its factorization.

21236000304 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 968557 (or 968551 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 21.

Adding to 21236000304 its reverse (40300063212), we get a palindrome (61536063516).

The spelling of 21236000304 in words is "twenty-one billion, two hundred thirty-six million, three hundred four", and thus it is an aban number.