18046738 has 4 divisors (see below), whose sum is σ = 27070110. Its totient is φ = 9023368.

The previous prime is 18046723. The next prime is 18046739. The reversal of 18046738 is 83764081.

It is a happy number.

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

It can be written as a sum of positive squares in only one way, i.e., 16916769 + 1129969 = 4113^2 + 1063^2 .

It is a junction number, because it is equal to n+sod(n) for n = 18046697 and 18046706.

It is not an unprimeable number, because it can be changed into a prime (18046739) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4511683 + ... + 4511686.

Almost surely, 2^18046738 is an apocalyptic number.

18046738 is a deficient number, since it is larger than the sum of its proper divisors (9023372).

18046738 is an equidigital number, since it uses as much as digits as its factorization.

18046738 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9023371.

The product of its (nonzero) digits is 32256, while the sum is 37.

The square root of 18046738 is about 4248.1452423381. The cubic root of 18046738 is about 262.3007733989.

The spelling of 18046738 in words is "eighteen million, forty-six thousand, seven hundred thirty-eight".