18588961 has 2 divisors, whose sum is σ = 18588962. Its totient is φ = 18588960.

The previous prime is 18588919. The next prime is 18588967. The reversal of 18588961 is 16988581.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 16353936 + 2235025 = 4044^2 + 1495^2 .

It is an emirp because it is prime and its reverse (16988581) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 18588961 - 2⁷ = 18588833 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (18588967) 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, 9294480 + 9294481.

It is an arithmetic number, because the mean of its divisors is an integer number (9294481).

Almost surely, 2^18588961 is an apocalyptic number.

It is an amenable number.

18588961 is a deficient number, since it is larger than the sum of its proper divisors (1).

18588961 is an equidigital number, since it uses as much as digits as its factorization.

18588961 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 138240, while the sum is 46.

The square root of 18588961 is about 4311.4917372065. The cubic root of 18588961 is about 264.9018789457.

The spelling of 18588961 in words is "eighteen million, five hundred eighty-eight thousand, nine hundred sixty-one".