18637342 has 4 divisors (see below), whose sum is σ = 27956016. Its totient is φ = 9318670.

The previous prime is 18637331. The next prime is 18637349. The reversal of 18637342 is 24373681.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 24373681 = 2633 ⋅9257.

It is a junction number, because it is equal to n+sod(n) for n = 18637298 and 18637307.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18637349) by changing a digit.

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, 4659334 + ... + 4659337.

It is an arithmetic number, because the mean of its divisors is an integer number (6989004).

Almost surely, 2^18637342 is an apocalyptic number.

18637342 is a deficient number, since it is larger than the sum of its proper divisors (9318674).

18637342 is an equidigital number, since it uses as much as digits as its factorization.

18637342 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9318673.

The product of its digits is 24192, while the sum is 34.

The square root of 18637342 is about 4317.0987943294. The cubic root of 18637342 is about 265.1314975716.

The spelling of 18637342 in words is "eighteen million, six hundred thirty-seven thousand, three hundred forty-two".