18464461 has 2 divisors, whose sum is σ = 18464462. Its totient is φ = 18464460.

The previous prime is 18464417. The next prime is 18464483. The reversal of 18464461 is 16446481.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 18224361 + 240100 = 4269^2 + 490^2 .

It is a cyclic number.

It is not a de Polignac number, because 18464461 - 2¹¹ = 18462413 is a prime.

It is a super-4 number, since 4×18464461⁴ (a number of 30 digits) contains 4444 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18564461) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9232230 + 9232231.

It is an arithmetic number, because the mean of its divisors is an integer number (9232231).

Almost surely, 2^18464461 is an apocalyptic number.

It is an amenable number.

18464461 is a deficient number, since it is larger than the sum of its proper divisors (1).

18464461 is an equidigital number, since it uses as much as digits as its factorization.

18464461 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 18432, while the sum is 34.

The square root of 18464461 is about 4297.0293226833. The cubic root of 18464461 is about 264.3091582111.

The spelling of 18464461 in words is "eighteen million, four hundred sixty-four thousand, four hundred sixty-one".