19358520977 has 2 divisors, whose sum is σ = 19358520978. Its totient is φ = 19358520976.

The previous prime is 19358520971. The next prime is 19358521033. The reversal of 19358520977 is 77902585391.

It is an a-pointer prime, because the next prime (19358521033) can be obtained adding 19358520977 to its sum of digits (56).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 18729564736 + 628956241 = 136856^2 + 25079^2 .

It is a cyclic number.

It is not a de Polignac number, because 19358520977 - 2⁶ = 19358520913 is a prime.

It is not a weakly prime, because it can be changed into another prime (19358520971) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9679260488 + 9679260489.

It is an arithmetic number, because the mean of its divisors is an integer number (9679260489).

Almost surely, 2^19358520977 is an apocalyptic number.

It is an amenable number.

19358520977 is a deficient number, since it is larger than the sum of its proper divisors (1).

19358520977 is an equidigital number, since it uses as much as digits as its factorization.

19358520977 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4762800, while the sum is 56.

The spelling of 19358520977 in words is "nineteen billion, three hundred fifty-eight million, five hundred twenty thousand, nine hundred seventy-seven".