21304245532 has 6 divisors (see below), whose sum is σ = 37282429688. Its totient is φ = 10652122764.

The previous prime is 21304245499. The next prime is 21304245551. The reversal of 21304245532 is 23554240312.

It is a junction number, because it is equal to n+sod(n) for n = 21304245494 and 21304245503.

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, 2663030688 + ... + 2663030695.

Almost surely, 2^21304245532 is an apocalyptic number.

It is an amenable number.

21304245532 is a deficient number, since it is larger than the sum of its proper divisors (15978184156).

21304245532 is a wasteful number, since it uses less digits than its factorization.

21304245532 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5326061387 (or 5326061385 counting only the distinct ones).

The product of its (nonzero) digits is 28800, while the sum is 31.

Adding to 21304245532 its reverse (23554240312), we get a palindrome (44858485844).

The spelling of 21304245532 in words is "twenty-one billion, three hundred four million, two hundred forty-five thousand, five hundred thirty-two".