20036280977 has 2 divisors, whose sum is σ = 20036280978. Its totient is φ = 20036280976.

The previous prime is 20036280967. The next prime is 20036281009. The reversal of 20036280977 is 77908263002.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 17561815441 + 2474465536 = 132521^2 + 49744^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20036280977 is a prime.

It is not a weakly prime, because it can be changed into another prime (20036280907) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10018140488 + 10018140489.

It is an arithmetic number, because the mean of its divisors is an integer number (10018140489).

Almost surely, 2^20036280977 is an apocalyptic number.

It is an amenable number.

20036280977 is a deficient number, since it is larger than the sum of its proper divisors (1).

20036280977 is an equidigital number, since it uses as much as digits as its factorization.

20036280977 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 254016, while the sum is 44.

The spelling of 20036280977 in words is "twenty billion, thirty-six million, two hundred eighty thousand, nine hundred seventy-seven".