20348750561 has 2 divisors, whose sum is σ = 20348750562. Its totient is φ = 20348750560.

The previous prime is 20348750489. The next prime is 20348750633. The reversal of 20348750561 is 16505784302.

It is a balanced prime because it is at equal distance from previous prime (20348750489) and next prime (20348750633).

It can be written as a sum of positive squares in only one way, i.e., 11155584400 + 9193166161 = 105620^2 + 95881^2 .

It is a cyclic number.

It is not a de Polignac number, because 20348750561 - 2²² = 20344556257 is a prime.

It is not a weakly prime, because it can be changed into another prime (20348750861) 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, 10174375280 + 10174375281.

It is an arithmetic number, because the mean of its divisors is an integer number (10174375281).

Almost surely, 2^20348750561 is an apocalyptic number.

It is an amenable number.

20348750561 is a deficient number, since it is larger than the sum of its proper divisors (1).

20348750561 is an equidigital number, since it uses as much as digits as its factorization.

20348750561 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 201600, while the sum is 41.

The spelling of 20348750561 in words is "twenty billion, three hundred forty-eight million, seven hundred fifty thousand, five hundred sixty-one".