18034407 has 10 divisors (see below), whose sum is σ = 26940408. Its totient is φ = 12022884.

The previous prime is 18034403. The next prime is 18034421. The reversal of 18034407 is 70443081.

It is not a de Polignac number, because 18034407 - 2² = 18034403 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18034403) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 111243 + ... + 111404.

Almost surely, 2^18034407 is an apocalyptic number.

18034407 is a deficient number, since it is larger than the sum of its proper divisors (8906001).

18034407 is an equidigital number, since it uses as much as digits as its factorization.

18034407 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 222659 (or 222650 counting only the distinct ones).

The product of its (nonzero) digits is 2688, while the sum is 27.

The square root of 18034407 is about 4246.6936550686. The cubic root of 18034407 is about 262.2410180424.

Adding to 18034407 its reverse (70443081), we get a palindrome (88477488).

The spelling of 18034407 in words is "eighteen million, thirty-four thousand, four hundred seven".