21401332334432 has 12 divisors (see below), whose sum is σ = 42133873033476. Its totient is φ = 10700666167200.

The previous prime is 21401332334413. The next prime is 21401332334477. The reversal of 21401332334432 is 23443323310412.

It is a junction number, because it is equal to n+sod(n) for n = 21401332334392 and 21401332334401.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 334395817694 + ... + 334395817757.

It is an arithmetic number, because the mean of its divisors is an integer number (3511156086123).

Almost surely, 2^{21401332334432} is an apocalyptic number.

It is an amenable number.

21401332334432 is a deficient number, since it is larger than the sum of its proper divisors (20732540699044).

21401332334432 is an equidigital number, since it uses as much as digits as its factorization.

21401332334432 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 668791635461 (or 668791635453 counting only the distinct ones).

The product of its (nonzero) digits is 124416, while the sum is 35.

Adding to 21401332334432 its reverse (23443323310412), we get a palindrome (44844655644844).

The spelling of 21401332334432 in words is "twenty-one trillion, four hundred one billion, three hundred thirty-two million, three hundred thirty-four thousand, four hundred thirty-two".