18063961 has 2 divisors, whose sum is σ = 18063962. Its totient is φ = 18063960.

The previous prime is 18063953. The next prime is 18063967. The reversal of 18063961 is 16936081.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 13987600 + 4076361 = 3740^2 + 2019^2 .

It is an emirp because it is prime and its reverse (16936081) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 18063961 - 2³ = 18063953 is a prime.

It is not a weakly prime, because it can be changed into another prime (18063967) 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, 9031980 + 9031981.

It is an arithmetic number, because the mean of its divisors is an integer number (9031981).

Almost surely, 2^18063961 is an apocalyptic number.

It is an amenable number.

18063961 is a deficient number, since it is larger than the sum of its proper divisors (1).

18063961 is an equidigital number, since it uses as much as digits as its factorization.

18063961 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7776, while the sum is 34.

The square root of 18063961 is about 4250.1718788774. The cubic root of 18063961 is about 262.3841895791.

The spelling of 18063961 in words is "eighteen million, sixty-three thousand, nine hundred sixty-one".