20511412525441 has 4 divisors (see below), whose sum is σ = 20703107969712. Its totient is φ = 20319717081172.

The previous prime is 20511412525433. The next prime is 20511412525489. The reversal of 20511412525441 is 14452521411502.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 20511412525441 - 2³ = 20511412525433 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 20511412525441.

It is not an unprimeable number, because it can be changed into a prime (20511412525421) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 95847721975 + ... + 95847722188.

It is an arithmetic number, because the mean of its divisors is an integer number (5175776992428).

Almost surely, 2^{20511412525441} is an apocalyptic number.

It is an amenable number.

20511412525441 is a deficient number, since it is larger than the sum of its proper divisors (191695444271).

20511412525441 is a wasteful number, since it uses less digits than its factorization.

20511412525441 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 191695444270.

The product of its (nonzero) digits is 64000, while the sum is 37.

Adding to 20511412525441 its reverse (14452521411502), we get a palindrome (34963933936943).

The spelling of 20511412525441 in words is "twenty trillion, five hundred eleven billion, four hundred twelve million, five hundred twenty-five thousand, four hundred forty-one".