21432033320 has 32 divisors (see below), whose sum is σ = 49398226920. Its totient is φ = 8363719680.

The previous prime is 21432033317. The next prime is 21432033353. The reversal of 21432033320 is 2333023412.

It can be written as a sum of positive squares in 4 ways, for example, as 14113915204 + 7318118116 = 118802^2 + 85546^2 .

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, 6532517 + ... + 6535796.

Almost surely, 2^21432033320 is an apocalyptic number.

21432033320 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21432033320 is an abundant number, since it is smaller than the sum of its proper divisors (27966193600).

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

21432033320 is a wasteful number, since it uses less digits than its factorization.

21432033320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13068365 (or 13068361 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 23.

Adding to 21432033320 its reverse (2333023412), we get a palindrome (23765056732).

The spelling of 21432033320 in words is "twenty-one billion, four hundred thirty-two million, thirty-three thousand, three hundred twenty".