17928020977 has 2 divisors, whose sum is σ = 17928020978. Its totient is φ = 17928020976.

The previous prime is 17928020947. The next prime is 17928020983. The reversal of 17928020977 is 77902082971.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 16385024016 + 1542996961 = 128004^2 + 39281^2 .

It is a cyclic number.

It is not a de Polignac number, because 17928020977 - 2⁷ = 17928020849 is a prime.

It is not a weakly prime, because it can be changed into another prime (17928020947) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8964010488 + 8964010489.

It is an arithmetic number, because the mean of its divisors is an integer number (8964010489).

Almost surely, 2^17928020977 is an apocalyptic number.

It is an amenable number.

17928020977 is a deficient number, since it is larger than the sum of its proper divisors (1).

17928020977 is an equidigital number, since it uses as much as digits as its factorization.

17928020977 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 889056, while the sum is 52.

The spelling of 17928020977 in words is "seventeen billion, nine hundred twenty-eight million, twenty thousand, nine hundred seventy-seven".