18432146 has 8 divisors (see below), whose sum is σ = 27713664. Its totient is φ = 9194260.

The previous prime is 18432143. The next prime is 18432157. The reversal of 18432146 is 64123481.

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

It is a super-3 number, since 3×18432146³ (a number of 23 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (18432143) 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, 9830 + ... + 11553.

It is an arithmetic number, because the mean of its divisors is an integer number (3464208).

Almost surely, 2^18432146 is an apocalyptic number.

18432146 is a deficient number, since it is larger than the sum of its proper divisors (9281518).

18432146 is a wasteful number, since it uses less digits than its factorization.

18432146 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21816.

The product of its digits is 4608, while the sum is 29.

The square root of 18432146 is about 4293.2675201995. The cubic root of 18432146 is about 264.1548773654.

It can be divided in two parts, 1843 and 2146, that multiplied together give a triangular number (3955078 = T₂₈₁₂).

The spelling of 18432146 in words is "eighteen million, four hundred thirty-two thousand, one hundred forty-six".