18496816069 has 2 divisors, whose sum is σ = 18496816070. Its totient is φ = 18496816068.

The previous prime is 18496816061. The next prime is 18496816081. The reversal of 18496816069 is 96061869481.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 17953320100 + 543495969 = 133990^2 + 23313^2 .

It is an emirp because it is prime and its reverse (96061869481) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 18496816069 - 2³ = 18496816061 is a prime.

It is a super-2 number, since 2×18496816069² (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 (18496816061) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9248408034 + 9248408035.

It is an arithmetic number, because the mean of its divisors is an integer number (9248408035).

Almost surely, 2^18496816069 is an apocalyptic number.

It is an amenable number.

18496816069 is a deficient number, since it is larger than the sum of its proper divisors (1).

18496816069 is an equidigital number, since it uses as much as digits as its factorization.

18496816069 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4478976, while the sum is 58.

The spelling of 18496816069 in words is "eighteen billion, four hundred ninety-six million, eight hundred sixteen thousand, sixty-nine".