18747142 has 4 divisors (see below), whose sum is σ = 28120716. Its totient is φ = 9373570.

The previous prime is 18747121. The next prime is 18747161. The reversal of 18747142 is 24174781.

It is a semiprime because it is the product of two primes.

It is a junction number, because it is equal to n+sod(n) for n = 18747098 and 18747107.

It is a congruent number.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 4686784 + ... + 4686787.

It is an arithmetic number, because the mean of its divisors is an integer number (7030179).

Almost surely, 2^18747142 is an apocalyptic number.

18747142 is a deficient number, since it is larger than the sum of its proper divisors (9373574).

18747142 is an equidigital number, since it uses as much as digits as its factorization.

18747142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9373573.

The product of its digits is 12544, while the sum is 34.

The square root of 18747142 is about 4329.7969929317. The cubic root of 18747142 is about 265.6511434845.

The spelling of 18747142 in words is "eighteen million, seven hundred forty-seven thousand, one hundred forty-two".