20324323657 has 6 divisors (see below), whose sum is σ = 22339959194. Its totient is φ = 18476657760.

The previous prime is 20324323597. The next prime is 20324323673. The reversal of 20324323657 is 75632342302.

It can be written as a sum of positive squares in only one way, i.e., 19998485056 + 325838601 = 141416^2 + 18051^2 .

It is not a de Polignac number, because 20324323657 - 2¹¹ = 20324321609 is a prime.

It is a super-2 number, since 2×20324323657² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20324393657) by changing a digit.

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 5 ways as a sum of consecutive naturals, for example, 83984688 + ... + 83984929.

Almost surely, 2^20324323657 is an apocalyptic number.

It is an amenable number.

20324323657 is a deficient number, since it is larger than the sum of its proper divisors (2015635537).

20324323657 is a wasteful number, since it uses less digits than its factorization.

20324323657 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 167969639 (or 167969628 counting only the distinct ones).

The product of its (nonzero) digits is 181440, while the sum is 37.

Adding to 20324323657 its reverse (75632342302), we get a palindrome (95956665959).

The spelling of 20324323657 in words is "twenty billion, three hundred twenty-four million, three hundred twenty-three thousand, six hundred fifty-seven".