21434034324 has 24 divisors (see below), whose sum is σ = 50029973728. Its totient is φ = 7142217120.

The previous prime is 21434034319. The next prime is 21434034409. The reversal of 21434034324 is 42343043412.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 21434034291 and 21434034300.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 271162 + ... + 341169.

Almost surely, 2^21434034324 is an apocalyptic number.

It is an amenable number.

21434034324 is an abundant number, since it is smaller than the sum of its proper divisors (28595939404).

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

21434034324 is a wasteful number, since it uses less digits than its factorization.

21434034324 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 615255 (or 615253 counting only the distinct ones).

The product of its (nonzero) digits is 27648, while the sum is 30.

Adding to 21434034324 its reverse (42343043412), we get a palindrome (63777077736).

The spelling of 21434034324 in words is "twenty-one billion, four hundred thirty-four million, thirty-four thousand, three hundred twenty-four".