18917363349 has 8 divisors (see below), whose sum is σ = 28025723520. Its totient is φ = 12611575548.

The previous prime is 18917363341. The next prime is 18917363351. The reversal of 18917363349 is 94336371981.

It is a happy number.

It is not a de Polignac number, because 18917363349 - 2³ = 18917363341 is a prime.

It is a super-3 number, since 3×18917363349³ (a number of 32 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 18917363295 and 18917363304.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18917363341) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 350321517 + ... + 350321570.

It is an arithmetic number, because the mean of its divisors is an integer number (3503215440).

Almost surely, 2^18917363349 is an apocalyptic number.

It is an amenable number.

18917363349 is a deficient number, since it is larger than the sum of its proper divisors (9108360171).

18917363349 is an equidigital number, since it uses as much as digits as its factorization.

18917363349 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 700643096 (or 700643090 counting only the distinct ones).

The product of its digits is 2939328, while the sum is 54.

The spelling of 18917363349 in words is "eighteen billion, nine hundred seventeen million, three hundred sixty-three thousand, three hundred forty-nine".