18958963 has 2 divisors, whose sum is σ = 18958964. Its totient is φ = 18958962.

The previous prime is 18958957. The next prime is 18958981. The reversal of 18958963 is 36985981.

It is a weak prime.

It is an emirp because it is prime and its reverse (36985981) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 18958963 - 2⁵ = 18958931 is a prime.

It is not a weakly prime, because it can be changed into another prime (18958993) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9479481 + 9479482.

It is an arithmetic number, because the mean of its divisors is an integer number (9479482).

Almost surely, 2^18958963 is an apocalyptic number.

18958963 is a deficient number, since it is larger than the sum of its proper divisors (1).

18958963 is an equidigital number, since it uses as much as digits as its factorization.

18958963 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 466560, while the sum is 49.

The square root of 18958963 is about 4354.1891323184. The cubic root of 18958963 is about 266.6479155218.

The spelling of 18958963 in words is "eighteen million, nine hundred fifty-eight thousand, nine hundred sixty-three".