21320322332 has 24 divisors (see below), whose sum is σ = 39321206400. Its totient is φ = 10087032816.

The previous prime is 21320322329. The next prime is 21320322337. The reversal of 21320322332 is 23322302312.

It is a super-2 number, since 2×21320322332² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21320322298 and 21320322307.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21320322337) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 103418 + ... + 230945.

It is an arithmetic number, because the mean of its divisors is an integer number (1638383600).

Almost surely, 2^21320322332 is an apocalyptic number.

It is an amenable number.

21320322332 is a deficient number, since it is larger than the sum of its proper divisors (18000884068).

21320322332 is a wasteful number, since it uses less digits than its factorization.

21320322332 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 335225 (or 335223 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 23.

Adding to 21320322332 its reverse (23322302312), we get a palindrome (44642624644).

The spelling of 21320322332 in words is "twenty-one billion, three hundred twenty million, three hundred twenty-two thousand, three hundred thirty-two".