18061129 has 4 divisors (see below), whose sum is σ = 18221076. Its totient is φ = 17901184.

The previous prime is 18061111. The next prime is 18061163. The reversal of 18061129 is 92116081.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 193600 + 17867529 = 440^2 + 4227^2 .

It is a cyclic number.

It is not a de Polignac number, because 18061129 - 2⁹ = 18060617 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 18061097 and 18061106.

It is not an unprimeable number, because it can be changed into a prime (18061529) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 79804 + ... + 80029.

It is an arithmetic number, because the mean of its divisors is an integer number (4555269).

Almost surely, 2^18061129 is an apocalyptic number.

It is an amenable number.

18061129 is a deficient number, since it is larger than the sum of its proper divisors (159947).

18061129 is a wasteful number, since it uses less digits than its factorization.

18061129 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 159946.

The product of its (nonzero) digits is 864, while the sum is 28.

The square root of 18061129 is about 4249.8387028216. The cubic root of 18061129 is about 262.3704769931.

The spelling of 18061129 in words is "eighteen million, sixty-one thousand, one hundred twenty-nine".