20061441577 has 2 divisors, whose sum is σ = 20061441578. Its totient is φ = 20061441576.

The previous prime is 20061441559. The next prime is 20061441581. The reversal of 20061441577 is 77514416002.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 19649310976 + 412130601 = 140176^2 + 20301^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20061441577 is a prime.

It is a super-2 number, since 2×20061441577² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (20061441557) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10030720788 + 10030720789.

It is an arithmetic number, because the mean of its divisors is an integer number (10030720789).

Almost surely, 2^20061441577 is an apocalyptic number.

It is an amenable number.

20061441577 is a deficient number, since it is larger than the sum of its proper divisors (1).

20061441577 is an equidigital number, since it uses as much as digits as its factorization.

20061441577 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 47040, while the sum is 37.

Adding to 20061441577 its reverse (77514416002), we get a palindrome (97575857579).

The spelling of 20061441577 in words is "twenty billion, sixty-one million, four hundred forty-one thousand, five hundred seventy-seven".