18131129 has 8 divisors (see below), whose sum is σ = 19239840. Its totient is φ = 17027136.

The previous prime is 18131117. The next prime is 18131137. The reversal of 18131129 is 92113181.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-18131129 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 18131098 and 18131107.

It is not an unprimeable number, because it can be changed into a prime (18131159) 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 7 ways as a sum of consecutive naturals, for example, 9662 + ... + 11384.

It is an arithmetic number, because the mean of its divisors is an integer number (2404980).

Almost surely, 2^18131129 is an apocalyptic number.

It is an amenable number.

18131129 is a deficient number, since it is larger than the sum of its proper divisors (1108711).

18131129 is a wasteful number, since it uses less digits than its factorization.

18131129 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2359.

The product of its digits is 432, while the sum is 26.

The square root of 18131129 is about 4258.0663451853. The cubic root of 18131129 is about 262.7089987845.

The spelling of 18131129 in words is "eighteen million, one hundred thirty-one thousand, one hundred twenty-nine".