18183819853 has 2 divisors, whose sum is σ = 18183819854. Its totient is φ = 18183819852.

The previous prime is 18183819847. The next prime is 18183819991. The reversal of 18183819853 is 35891838181.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 17465472649 + 718347204 = 132157^2 + 26802^2 .

It is a cyclic number.

It is not a de Polignac number, because 18183819853 - 2⁹ = 18183819341 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 18183819794 and 18183819803.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18183819653) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9091909926 + 9091909927.

It is an arithmetic number, because the mean of its divisors is an integer number (9091909927).

Almost surely, 2^18183819853 is an apocalyptic number.

It is an amenable number.

18183819853 is a deficient number, since it is larger than the sum of its proper divisors (1).

18183819853 is an equidigital number, since it uses as much as digits as its factorization.

18183819853 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1658880, while the sum is 55.

The spelling of 18183819853 in words is "eighteen billion, one hundred eighty-three million, eight hundred nineteen thousand, eight hundred fifty-three".