21432043224312 has 64 divisors (see below), whose sum is σ = 61235605344000. Its totient is φ = 6123321308160.

The previous prime is 21432043224289. The next prime is 21432043224433. The reversal of 21432043224312 is 21342234023412.

It is a happy number.

It is a super-3 number, since 3×21432043224312³ (a number of 41 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 15 ways as a sum of consecutive naturals, for example, 7565064 + ... + 10004712.

It is an arithmetic number, because the mean of its divisors is an integer number (956806333500).

Almost surely, 2^{21432043224312} is an apocalyptic number.

It is an amenable number.

21432043224312 is an abundant number, since it is smaller than the sum of its proper divisors (39803562119688).

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

21432043224312 is a wasteful number, since it uses less digits than its factorization.

21432043224312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2491956 (or 2491952 counting only the distinct ones).

The product of its (nonzero) digits is 55296, while the sum is 33.

Adding to 21432043224312 its reverse (21342234023412), we get a palindrome (42774277247724).

The spelling of 21432043224312 in words is "twenty-one trillion, four hundred thirty-two billion, forty-three million, two hundred twenty-four thousand, three hundred twelve".