18232131 has 8 divisors (see below), whose sum is σ = 24436240. Its totient is φ = 12091392.

The previous prime is 18232127. The next prime is 18232141. The reversal of 18232131 is 13123281.

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

It is not a de Polignac number, because 18232131 - 2² = 18232127 is a prime.

It is a super-2 number, since 2×18232131² = 664821201602322, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 18232098 and 18232107.

It is not an unprimeable number, because it can be changed into a prime (18232111) 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, 15166 + ... + 16323.

It is an arithmetic number, because the mean of its divisors is an integer number (3054530).

Almost surely, 2^18232131 is an apocalyptic number.

18232131 is a deficient number, since it is larger than the sum of its proper divisors (6204109).

18232131 is a wasteful number, since it uses less digits than its factorization.

18232131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31685.

The product of its digits is 288, while the sum is 21.

The square root of 18232131 is about 4269.9099522121. The cubic root of 18232131 is about 263.1959148779.

The spelling of 18232131 in words is "eighteen million, two hundred thirty-two thousand, one hundred thirty-one".