21220314324 has 24 divisors (see below), whose sum is σ = 54015345888. Its totient is φ = 6430398240.

The previous prime is 21220314289. The next prime is 21220314329. The reversal of 21220314324 is 42341302212.

It is a happy number.

It is a super-3 number, since 3×21220314324³ (a number of 32 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21220314294 and 21220314303.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21220314329) 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, 80379847 + ... + 80380110.

It is an arithmetic number, because the mean of its divisors is an integer number (2250639412).

Almost surely, 2^21220314324 is an apocalyptic number.

It is an amenable number.

21220314324 is an abundant number, since it is smaller than the sum of its proper divisors (32795031564).

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

21220314324 is a wasteful number, since it uses less digits than its factorization.

21220314324 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 160759975 (or 160759973 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 24.

Adding to 21220314324 its reverse (42341302212), we get a palindrome (63561616536).

The spelling of 21220314324 in words is "twenty-one billion, two hundred twenty million, three hundred fourteen thousand, three hundred twenty-four".