18188607373 has 2 divisors, whose sum is σ = 18188607374. Its totient is φ = 18188607372.

The previous prime is 18188607347. The next prime is 18188607383. The reversal of 18188607373 is 37370688181.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 15139579849 + 3049027524 = 123043^2 + 55218^2 .

It is an emirp because it is prime and its reverse (37370688181) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 18188607373 - 2¹³ = 18188599181 is a prime.

It is a super-2 number, since 2×18188607373² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 18188607373.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18188607383) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9094303686 + 9094303687.

It is an arithmetic number, because the mean of its divisors is an integer number (9094303687).

Almost surely, 2^18188607373 is an apocalyptic number.

It is an amenable number.

18188607373 is a deficient number, since it is larger than the sum of its proper divisors (1).

18188607373 is an equidigital number, since it uses as much as digits as its factorization.

18188607373 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1354752, while the sum is 52.

The spelling of 18188607373 in words is "eighteen billion, one hundred eighty-eight million, six hundred seven thousand, three hundred seventy-three".