21232340304 has 40 divisors (see below), whose sum is σ = 62685958080. Its totient is φ = 6066382848.

The previous prime is 21232340303. The next prime is 21232340329. The reversal of 21232340304 is 40304323212.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21232340303) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 31595409 + ... + 31596080.

It is an arithmetic number, because the mean of its divisors is an integer number (1567148952).

Almost surely, 2^21232340304 is an apocalyptic number.

21232340304 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

21232340304 is an abundant number, since it is smaller than the sum of its proper divisors (41453617776).

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

21232340304 is a wasteful number, since it uses less digits than its factorization.

21232340304 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 63191507 (or 63191501 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 24.

Adding to 21232340304 its reverse (40304323212), we get a palindrome (61536663516).

The spelling of 21232340304 in words is "twenty-one billion, two hundred thirty-two million, three hundred forty thousand, three hundred four".