20532441421 has 4 divisors (see below), whose sum is σ = 20763143100. Its totient is φ = 20301739744.

The previous prime is 20532441403. The next prime is 20532441431. The reversal of 20532441421 is 12414423502.

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 1904013225 + 18628428196 = 43635^2 + 136486^2 .

It is a cyclic number.

It is not a de Polignac number, because 20532441421 - 2⁹ = 20532440909 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20532441421.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20532441431) 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 3 ways as a sum of consecutive naturals, for example, 115350706 + ... + 115350883.

It is an arithmetic number, because the mean of its divisors is an integer number (5190785775).

Almost surely, 2^20532441421 is an apocalyptic number.

It is an amenable number.

20532441421 is a deficient number, since it is larger than the sum of its proper divisors (230701679).

20532441421 is an equidigital number, since it uses as much as digits as its factorization.

20532441421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 230701678.

The product of its (nonzero) digits is 7680, while the sum is 28.

Adding to 20532441421 its reverse (12414423502), we get a palindrome (32946864923).

The spelling of 20532441421 in words is "twenty billion, five hundred thirty-two million, four hundred forty-one thousand, four hundred twenty-one".