21041432304 has 40 divisors (see below), whose sum is σ = 57554508240. Its totient is φ = 6601233408.

The previous prime is 21041432239. The next prime is 21041432317. The reversal of 21041432304 is 40323414012.

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

It is a congruent number.

It is an unprimeable number.

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, 12892219 + ... + 12893850.

It is an arithmetic number, because the mean of its divisors is an integer number (1438862706).

Almost surely, 2^21041432304 is an apocalyptic number.

21041432304 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

21041432304 is an abundant number, since it is smaller than the sum of its proper divisors (36513075936).

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

21041432304 is a wasteful number, since it uses less digits than its factorization.

21041432304 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25786097 (or 25786091 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 24.

Adding to 21041432304 its reverse (40323414012), we get a palindrome (61364846316).

The spelling of 21041432304 in words is "twenty-one billion, forty-one million, four hundred thirty-two thousand, three hundred four".