21325415332 has 24 divisors (see below), whose sum is σ = 42554337336. Its totient is φ = 9263528448.

The previous prime is 21325415317. The next prime is 21325415341. The reversal of 21325415332 is 23351452312.

It can be written as a sum of positive squares in 4 ways, for example, as 6219530496 + 15105884836 = 78864^2 + 122906^2 .

It is a junction number, because it is equal to n+sod(n) for n = 21325415294 and 21325415303.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12061003 + ... + 12062770.

It is an arithmetic number, because the mean of its divisors is an integer number (1773097389).

Almost surely, 2^21325415332 is an apocalyptic number.

It is an amenable number.

21325415332 is a deficient number, since it is larger than the sum of its proper divisors (21228922004).

21325415332 is a wasteful number, since it uses less digits than its factorization.

21325415332 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24123807 (or 24123805 counting only the distinct ones).

The product of its digits is 21600, while the sum is 31.

Adding to 21325415332 its reverse (23351452312), we get a palindrome (44676867644).

The spelling of 21325415332 in words is "twenty-one billion, three hundred twenty-five million, four hundred fifteen thousand, three hundred thirty-two".