18910754497 has 2 divisors, whose sum is σ = 18910754498. Its totient is φ = 18910754496.

The previous prime is 18910754479. The next prime is 18910754521. The reversal of 18910754497 is 79445701981.

It is a happy number.

Together with previous prime (18910754479) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 15408008641 + 3502745856 = 124129^2 + 59184^2 .

It is a cyclic number.

It is not a de Polignac number, because 18910754497 - 2¹¹ = 18910752449 is a prime.

It is not a weakly prime, because it can be changed into another prime (18910757497) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9455377248 + 9455377249.

It is an arithmetic number, because the mean of its divisors is an integer number (9455377249).

Almost surely, 2^18910754497 is an apocalyptic number.

It is an amenable number.

18910754497 is a deficient number, since it is larger than the sum of its proper divisors (1).

18910754497 is an equidigital number, since it uses as much as digits as its factorization.

18910754497 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2540160, while the sum is 55.

The spelling of 18910754497 in words is "eighteen billion, nine hundred ten million, seven hundred fifty-four thousand, four hundred ninety-seven".