18703670369 has 2 divisors, whose sum is σ = 18703670370. Its totient is φ = 18703670368.

The previous prime is 18703670347. The next prime is 18703670371. The reversal of 18703670369 is 96307630781.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 18465276769 + 238393600 = 135887^2 + 15440^2 .

It is a cyclic number.

It is not a de Polignac number, because 18703670369 - 2¹² = 18703666273 is a prime.

It is a super-2 number, since 2×18703670369² (a number of 21 digits) contains 22 as substring.

Together with 18703670371, it forms a pair of twin primes.

It is a Chen prime.

It is an alternating number because its digits alternate between odd and even.

It is not a weakly prime, because it can be changed into another prime (18703670329) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9351835184 + 9351835185.

It is an arithmetic number, because the mean of its divisors is an integer number (9351835185).

Almost surely, 2^18703670369 is an apocalyptic number.

It is an amenable number.

18703670369 is a deficient number, since it is larger than the sum of its proper divisors (1).

18703670369 is an equidigital number, since it uses as much as digits as its factorization.

18703670369 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1143072, while the sum is 50.

The spelling of 18703670369 in words is "eighteen billion, seven hundred three million, six hundred seventy thousand, three hundred sixty-nine".