18348634 has 4 divisors (see below), whose sum is σ = 27522954. Its totient is φ = 9174316.

The previous prime is 18348613. The next prime is 18348643. The reversal of 18348634 is 43684381.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 43684381 = 13 ⋅3360337.

It can be written as a sum of positive squares in only one way, i.e., 15233409 + 3115225 = 3903^2 + 1765^2 .

It is a junction number, because it is equal to n+sod(n) for n = 18348593 and 18348602.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4587157 + ... + 4587160.

Almost surely, 2^18348634 is an apocalyptic number.

18348634 is a deficient number, since it is larger than the sum of its proper divisors (9174320).

18348634 is an equidigital number, since it uses as much as digits as its factorization.

18348634 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9174319.

The product of its digits is 55296, while the sum is 37.

The square root of 18348634 is about 4283.5305531769. The cubic root of 18348634 is about 263.7553307848.

The spelling of 18348634 in words is "eighteen million, three hundred forty-eight thousand, six hundred thirty-four".