21432003312 has 40 divisors (see below), whose sum is σ = 55485647104. Its totient is φ = 7128563904.

The previous prime is 21432003289. The next prime is 21432003323. The reversal of 21432003312 is 21330023412.

It is a super-3 number, since 3×21432003312³ (a number of 32 digits) contains 333 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 459958 + ... + 504405.

Almost surely, 2^21432003312 is an apocalyptic number.

It is an amenable number.

21432003312 is an abundant number, since it is smaller than the sum of its proper divisors (34053643792).

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

21432003312 is a wasteful number, since it uses less digits than its factorization.

21432003312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 964837 (or 964831 counting only the distinct ones).

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

Adding to 21432003312 its reverse (21330023412), we get a palindrome (42762026724).

The spelling of 21432003312 in words is "twenty-one billion, four hundred thirty-two million, three thousand, three hundred twelve".