21030432340432 has 10 divisors (see below), whose sum is σ = 40746462659618. Its totient is φ = 10515216170208.

The previous prime is 21030432340417. The next prime is 21030432340433. The reversal of 21030432340432 is 23404323403012.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 20673717610896 + 356714729536 = 4546836^2 + 597256^2 .

It is a junction number, because it is equal to n+sod(n) for n = 21030432340394 and 21030432340403.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21030432340433) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 657201010623 + ... + 657201010654.

Almost surely, 2^{21030432340432} is an apocalyptic number.

It is an amenable number.

21030432340432 is a deficient number, since it is larger than the sum of its proper divisors (19716030319186).

21030432340432 is a wasteful number, since it uses less digits than its factorization.

21030432340432 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1314402021285 (or 1314402021279 counting only the distinct ones).

The product of its (nonzero) digits is 41472, while the sum is 31.

Adding to 21030432340432 its reverse (23404323403012), we get a palindrome (44434755743444).

The spelling of 21030432340432 in words is "twenty-one trillion, thirty billion, four hundred thirty-two million, three hundred forty thousand, four hundred thirty-two".