18742107 has 4 divisors (see below), whose sum is σ = 24989480. Its totient is φ = 12494736.

The previous prime is 18742099. The next prime is 18742121. The reversal of 18742107 is 70124781.

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

It is not a de Polignac number, because 18742107 - 2³ = 18742099 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18742187) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3123682 + ... + 3123687.

It is an arithmetic number, because the mean of its divisors is an integer number (6247370).

Almost surely, 2^18742107 is an apocalyptic number.

18742107 is a deficient number, since it is larger than the sum of its proper divisors (6247373).

18742107 is an equidigital number, since it uses as much as digits as its factorization.

18742107 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6247372.

The product of its (nonzero) digits is 3136, while the sum is 30.

The square root of 18742107 is about 4329.2155178508. The cubic root of 18742107 is about 265.6273590010.

Adding to 18742107 its reverse (70124781), we get a palindrome (88866888).

The spelling of 18742107 in words is "eighteen million, seven hundred forty-two thousand, one hundred seven".