18158132 has 12 divisors (see below), whose sum is σ = 33158496. Its totient is φ = 8684280.

The previous prime is 18158113. The next prime is 18158137. The reversal of 18158132 is 23185181.

It is a junction number, because it is equal to n+sod(n) for n = 18158095 and 18158104.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18158137) 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, 98594 + ... + 98777.

It is an arithmetic number, because the mean of its divisors is an integer number (2763208).

Almost surely, 2^18158132 is an apocalyptic number.

It is an amenable number.

18158132 is a deficient number, since it is larger than the sum of its proper divisors (15000364).

18158132 is a wasteful number, since it uses less digits than its factorization.

18158132 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 197398 (or 197396 counting only the distinct ones).

The product of its digits is 1920, while the sum is 29.

The square root of 18158132 is about 4261.2359709361. The cubic root of 18158132 is about 262.8393530921.

The spelling of 18158132 in words is "eighteen million, one hundred fifty-eight thousand, one hundred thirty-two".