18463121 has 2 divisors, whose sum is σ = 18463122. Its totient is φ = 18463120.

The previous prime is 18463099. The next prime is 18463129. The reversal of 18463121 is 12136481.

18463121 is nontrivially palindromic in base 4.

18463121 is an esthetic number in base 4, because in such base its adjacent digits differ by 1.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 18395521 + 67600 = 4289^2 + 260^2 .

It is a cyclic number.

It is not a de Polignac number, because 18463121 - 2¹⁸ = 18200977 is a prime.

It is not a weakly prime, because it can be changed into another prime (18463129) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9231560 + 9231561.

It is an arithmetic number, because the mean of its divisors is an integer number (9231561).

Almost surely, 2^18463121 is an apocalyptic number.

It is an amenable number.

18463121 is a deficient number, since it is larger than the sum of its proper divisors (1).

18463121 is an equidigital number, since it uses as much as digits as its factorization.

18463121 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1152, while the sum is 26.

The square root of 18463121 is about 4296.8733981815. The cubic root of 18463121 is about 264.3027642553.

The spelling of 18463121 in words is "eighteen million, four hundred sixty-three thousand, one hundred twenty-one".