20211847541 has 2 divisors, whose sum is σ = 20211847542. Its totient is φ = 20211847540.

The previous prime is 20211847477. The next prime is 20211847583. The reversal of 20211847541 is 14574811202.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 20198378641 + 13468900 = 142121^2 + 3670^2 .

It is a cyclic number.

It is not a de Polignac number, because 20211847541 - 2⁶ = 20211847477 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20211847741) 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 as a sum of consecutive naturals, namely, 10105923770 + 10105923771.

It is an arithmetic number, because the mean of its divisors is an integer number (10105923771).

Almost surely, 2^20211847541 is an apocalyptic number.

It is an amenable number.

20211847541 is a deficient number, since it is larger than the sum of its proper divisors (1).

20211847541 is an equidigital number, since it uses as much as digits as its factorization.

20211847541 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 17920, while the sum is 35.

The spelling of 20211847541 in words is "twenty billion, two hundred eleven million, eight hundred forty-seven thousand, five hundred forty-one".