18340046 has 4 divisors (see below), whose sum is σ = 27510072. Its totient is φ = 9170022.

The previous prime is 18340043. The next prime is 18340051. The reversal of 18340046 is 64004381.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 64004381 = 7 ⋅9143483.

It is a junction number, because it is equal to n+sod(n) for n = 18339997 and 18340024.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18340043) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4585010 + ... + 4585013.

It is an arithmetic number, because the mean of its divisors is an integer number (6877518).

Almost surely, 2^18340046 is an apocalyptic number.

18340046 is a deficient number, since it is larger than the sum of its proper divisors (9170026).

18340046 is an equidigital number, since it uses as much as digits as its factorization.

18340046 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9170025.

The product of its (nonzero) digits is 2304, while the sum is 26.

The square root of 18340046 is about 4282.5279917357. The cubic root of 18340046 is about 263.7141745100.

The spelling of 18340046 in words is "eighteen million, three hundred forty thousand, forty-six".