18471142 has 8 divisors (see below), whose sum is σ = 27729000. Its totient is φ = 9228144.

The previous prime is 18471137. The next prime is 18471143. The reversal of 18471142 is 24117481.

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

It is a self number, because there is not a number n which added to its sum of digits gives 18471142.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18471143) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 234 + ... + 6082.

It is an arithmetic number, because the mean of its divisors is an integer number (3466125).

Almost surely, 2^18471142 is an apocalyptic number.

18471142 is a deficient number, since it is larger than the sum of its proper divisors (9257858).

18471142 is a wasteful number, since it uses less digits than its factorization.

18471142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7430.

The product of its digits is 1792, while the sum is 28.

The square root of 18471142 is about 4297.8066499088. The cubic root of 18471142 is about 264.3410327140.

The spelling of 18471142 in words is "eighteen million, four hundred seventy-one thousand, one hundred forty-two".