18523126522949 has 2 divisors, whose sum is σ = 18523126522950. Its totient is φ = 18523126522948.

The previous prime is 18523126522829. The next prime is 18523126522951. The reversal of 18523126522949 is 94922562132581.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 16401609012100 + 2121517510849 = 4049890^2 + 1456543^2 .

It is a cyclic number.

It is not a de Polignac number, because 18523126522949 - 2⁴⁰ = 17423614895173 is a prime.

Together with 18523126522951, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18523126522349) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9261563261474 + 9261563261475.

It is an arithmetic number, because the mean of its divisors is an integer number (9261563261475).

Almost surely, 2^{18523126522949} is an apocalyptic number.

It is an amenable number.

18523126522949 is a deficient number, since it is larger than the sum of its proper divisors (1).

18523126522949 is an equidigital number, since it uses as much as digits as its factorization.

18523126522949 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 18662400, while the sum is 59.

The spelling of 18523126522949 in words is "eighteen trillion, five hundred twenty-three billion, one hundred twenty-six million, five hundred twenty-two thousand, nine hundred forty-nine".