19773000077 has 2 divisors, whose sum is σ = 19773000078. Its totient is φ = 19773000076.

The previous prime is 19773000053. The next prime is 19773000083. The reversal of 19773000077 is 77000037791.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 18983052841 + 789947236 = 137779^2 + 28106^2 .

It is a cyclic number.

It is not a de Polignac number, because 19773000077 - 2²² = 19768805773 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 19772999998 and 19773000043.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (19773008077) 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, 9886500038 + 9886500039.

It is an arithmetic number, because the mean of its divisors is an integer number (9886500039).

Almost surely, 2^19773000077 is an apocalyptic number.

It is an amenable number.

19773000077 is a deficient number, since it is larger than the sum of its proper divisors (1).

19773000077 is an equidigital number, since it uses as much as digits as its factorization.

19773000077 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 64827, while the sum is 41.

The spelling of 19773000077 in words is "nineteen billion, seven hundred seventy-three million, seventy-seven", and thus it is an aban number.