20512221330541 has 2 divisors, whose sum is σ = 20512221330542. Its totient is φ = 20512221330540.

The previous prime is 20512221330481. The next prime is 20512221330571. The reversal of 20512221330541 is 14503312221502.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 10646679555625 + 9865541774916 = 3262925^2 + 3140946^2 .

It is a cyclic number.

It is not a de Polignac number, because 20512221330541 - 2¹¹ = 20512221328493 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20512221330571) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10256110665270 + 10256110665271.

It is an arithmetic number, because the mean of its divisors is an integer number (10256110665271).

Almost surely, 2^{20512221330541} is an apocalyptic number.

It is an amenable number.

20512221330541 is a deficient number, since it is larger than the sum of its proper divisors (1).

20512221330541 is an equidigital number, since it uses as much as digits as its factorization.

20512221330541 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 14400, while the sum is 31.

The spelling of 20512221330541 in words is "twenty trillion, five hundred twelve billion, two hundred twenty-one million, three hundred thirty thousand, five hundred forty-one".