18959016749 has 2 divisors, whose sum is σ = 18959016750. Its totient is φ = 18959016748.

The previous prime is 18959016691. The next prime is 18959016751. The reversal of 18959016749 is 94761095981.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 15126540100 + 3832476649 = 122990^2 + 61907^2 .

It is a cyclic number.

It is not a de Polignac number, because 18959016749 - 2²⁰ = 18957968173 is a prime.

Together with 18959016751, 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 (18959016649) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9479508374 + 9479508375.

It is an arithmetic number, because the mean of its divisors is an integer number (9479508375).

Almost surely, 2^18959016749 is an apocalyptic number.

It is an amenable number.

18959016749 is a deficient number, since it is larger than the sum of its proper divisors (1).

18959016749 is an equidigital number, since it uses as much as digits as its factorization.

18959016749 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4898880, while the sum is 59.

The spelling of 18959016749 in words is "eighteen billion, nine hundred fifty-nine million, sixteen thousand, seven hundred forty-nine".