20532424345 has 4 divisors (see below), whose sum is σ = 24638909220. Its totient is φ = 16425939472.

The previous prime is 20532424343. The next prime is 20532424397. The reversal of 20532424345 is 54342423502.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 14623581184 + 5908843161 = 120928^2 + 76869^2 .

It is a cyclic number.

It is not a de Polignac number, because 20532424345 - 2¹ = 20532424343 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20532424345.

It is not an unprimeable number, because it can be changed into a prime (20532424343) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2053242430 + ... + 2053242439.

It is an arithmetic number, because the mean of its divisors is an integer number (6159727305).

Almost surely, 2^20532424345 is an apocalyptic number.

It is an amenable number.

20532424345 is a deficient number, since it is larger than the sum of its proper divisors (4106484875).

20532424345 is an equidigital number, since it uses as much as digits as its factorization.

20532424345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4106484874.

The product of its (nonzero) digits is 115200, while the sum is 34.

Adding to 20532424345 its reverse (54342423502), we get a palindrome (74874847847).

The spelling of 20532424345 in words is "twenty billion, five hundred thirty-two million, four hundred twenty-four thousand, three hundred forty-five".