18196676749 has 2 divisors, whose sum is σ = 18196676750. Its totient is φ = 18196676748.

The previous prime is 18196676741. The next prime is 18196676753. The reversal of 18196676749 is 94767669181.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 13292475849 + 4904200900 = 115293^2 + 70030^2 .

It is a cyclic number.

It is not a de Polignac number, because 18196676749 - 2³ = 18196676741 is a prime.

It is a super-2 number, since 2×18196676749² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18196676741) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9098338374 + 9098338375.

It is an arithmetic number, because the mean of its divisors is an integer number (9098338375).

Almost surely, 2^18196676749 is an apocalyptic number.

It is an amenable number.

18196676749 is a deficient number, since it is larger than the sum of its proper divisors (1).

18196676749 is an equidigital number, since it uses as much as digits as its factorization.

18196676749 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 27433728, while the sum is 64.

The spelling of 18196676749 in words is "eighteen billion, one hundred ninety-six million, six hundred seventy-six thousand, seven hundred forty-nine".