18485129 has 4 divisors (see below), whose sum is σ = 19907076. Its totient is φ = 17063184.

The previous prime is 18485111. The next prime is 18485143. The reversal of 18485129 is 92158481.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 92158481 = 1093 ⋅84317.

It can be written as a sum of positive squares in 2 ways, for example, as 3892729 + 14592400 = 1973^2 + 3820^2 .

It is a cyclic number.

It is not a de Polignac number, because 18485129 - 2²⁴ = 1707913 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 18485092 and 18485101.

It is not an unprimeable number, because it can be changed into a prime (18485149) 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 in 3 ways as a sum of consecutive naturals, for example, 710954 + ... + 710979.

It is an arithmetic number, because the mean of its divisors is an integer number (4976769).

Almost surely, 2^18485129 is an apocalyptic number.

It is an amenable number.

18485129 is a deficient number, since it is larger than the sum of its proper divisors (1421947).

18485129 is a wasteful number, since it uses less digits than its factorization.

18485129 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1421946.

The product of its digits is 23040, while the sum is 38.

The square root of 18485129 is about 4299.4335673435. The cubic root of 18485129 is about 264.4077386630.

The spelling of 18485129 in words is "eighteen million, four hundred eighty-five thousand, one hundred twenty-nine".