18875369 has 2 divisors, whose sum is σ = 18875370. Its totient is φ = 18875368.

The previous prime is 18875359. The next prime is 18875377. The reversal of 18875369 is 96357881.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 18705625 + 169744 = 4325^2 + 412^2 .

It is an emirp because it is prime and its reverse (96357881) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 18875369 - 2²⁴ = 2098153 is a prime.

It is a super-2 number, since 2×18875369² = 712559109772322, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (18875359) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9437684 + 9437685.

It is an arithmetic number, because the mean of its divisors is an integer number (9437685).

Almost surely, 2^18875369 is an apocalyptic number.

It is an amenable number.

18875369 is a deficient number, since it is larger than the sum of its proper divisors (1).

18875369 is an equidigital number, since it uses as much as digits as its factorization.

18875369 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 362880, while the sum is 47.

The square root of 18875369 is about 4344.5792661661. The cubic root of 18875369 is about 266.2554361267.

It can be divided in two parts, 188 and 75369, that added together give a palindrome (75557).

The spelling of 18875369 in words is "eighteen million, eight hundred seventy-five thousand, three hundred sixty-nine".