20199520841 has 2 divisors, whose sum is σ = 20199520842. Its totient is φ = 20199520840.

The previous prime is 20199520807. The next prime is 20199520849. The reversal of 20199520841 is 14802599102.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 13946665216 + 6252855625 = 118096^2 + 79075^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20199520841 is a prime.

It is not a weakly prime, because it can be changed into another prime (20199520849) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10099760420 + 10099760421.

It is an arithmetic number, because the mean of its divisors is an integer number (10099760421).

Almost surely, 2^20199520841 is an apocalyptic number.

It is an amenable number.

20199520841 is a deficient number, since it is larger than the sum of its proper divisors (1).

20199520841 is an equidigital number, since it uses as much as digits as its factorization.

20199520841 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 51840, while the sum is 41.

The spelling of 20199520841 in words is "twenty billion, one hundred ninety-nine million, five hundred twenty thousand, eight hundred forty-one".