21343132432 has 10 divisors (see below), whose sum is σ = 41352319118. Its totient is φ = 10671566208.

The previous prime is 21343132423. The next prime is 21343132441. The reversal of 21343132432 is 23423134312.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (21343132423) and next prime (21343132441).

It can be written as a sum of positive squares in only one way, i.e., 17467322896 + 3875809536 = 132164^2 + 62256^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 21343132432.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 666972873 + ... + 666972904.

Almost surely, 2^21343132432 is an apocalyptic number.

It is an amenable number.

21343132432 is a deficient number, since it is larger than the sum of its proper divisors (20009186686).

21343132432 is a wasteful number, since it uses less digits than its factorization.

21343132432 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1333945785 (or 1333945779 counting only the distinct ones).

The product of its digits is 10368, while the sum is 28.

Adding to 21343132432 its reverse (23423134312), we get a palindrome (44766266744).

The spelling of 21343132432 in words is "twenty-one billion, three hundred forty-three million, one hundred thirty-two thousand, four hundred thirty-two".