20545324424 has 8 divisors (see below), whose sum is σ = 38522483310. Its totient is φ = 10272662208.

The previous prime is 20545324421. The next prime is 20545324451. The reversal of 20545324424 is 42442354502.

It can be written as a sum of positive squares in only one way, i.e., 17720401924 + 2824922500 = 133118^2 + 53150^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a super-2 number, since 2×20545324424² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (20545324421) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1284082769 + ... + 1284082784.

Almost surely, 2^20545324424 is an apocalyptic number.

It is an amenable number.

20545324424 is a deficient number, since it is larger than the sum of its proper divisors (17977158886).

20545324424 is a wasteful number, since it uses less digits than its factorization.

20545324424 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2568165559 (or 2568165555 counting only the distinct ones).

The product of its (nonzero) digits is 153600, while the sum is 35.

Adding to 20545324424 its reverse (42442354502), we get a palindrome (62987678926).

The spelling of 20545324424 in words is "twenty billion, five hundred forty-five million, three hundred twenty-four thousand, four hundred twenty-four".