18728363 has 2 divisors, whose sum is σ = 18728364. Its totient is φ = 18728362.

The previous prime is 18728323. The next prime is 18728393. The reversal of 18728363 is 36382781.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 18728363 - 2¹⁰ = 18727339 is a prime.

It is not a weakly prime, because it can be changed into another prime (18728323) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9364181 + 9364182.

It is an arithmetic number, because the mean of its divisors is an integer number (9364182).

Almost surely, 2^18728363 is an apocalyptic number.

18728363 is a deficient number, since it is larger than the sum of its proper divisors (1).

18728363 is an equidigital number, since it uses as much as digits as its factorization.

18728363 is an evil number, because the sum of its binary digits is even.

The product of its digits is 48384, while the sum is 38.

The square root of 18728363 is about 4327.6278721720. The cubic root of 18728363 is about 265.5624129913.

It can be divided in two parts, 18728 and 363, that added together give a palindrome (19091).

The spelling of 18728363 in words is "eighteen million, seven hundred twenty-eight thousand, three hundred sixty-three".