20345121441 has 24 divisors (see below), whose sum is σ = 30024077096. Its totient is φ = 13271869440.

The previous prime is 20345121413. The next prime is 20345121449. The reversal of 20345121441 is 14412154302.

20345121441 is a `hidden beast` number, since 2 + 0 + 3 + 4 + 512 + 144 + 1 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 1992729600 + 18352391841 = 44640^2 + 135471^2 .

It is not a de Polignac number, because 20345121441 - 2²⁹ = 19808250529 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20345121449) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 9951 + ... + 201963.

Almost surely, 2^20345121441 is an apocalyptic number.

It is an amenable number.

20345121441 is a deficient number, since it is larger than the sum of its proper divisors (9678955655).

20345121441 is a wasteful number, since it uses less digits than its factorization.

20345121441 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 192273 (or 192270 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 27.

Adding to 20345121441 its reverse (14412154302), we get a palindrome (34757275743).

The spelling of 20345121441 in words is "twenty billion, three hundred forty-five million, one hundred twenty-one thousand, four hundred forty-one".