18394007 has 4 divisors (see below), whose sum is σ = 18442920. Its totient is φ = 18345096.

The previous prime is 18393989. The next prime is 18394073. The reversal of 18394007 is 70049381.

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

It is a cyclic number.

It is not a de Polignac number, because 18394007 - 2⁸ = 18393751 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18394307) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 23888 + ... + 24645.

It is an arithmetic number, because the mean of its divisors is an integer number (4610730).

Almost surely, 2^18394007 is an apocalyptic number.

18394007 is a deficient number, since it is larger than the sum of its proper divisors (48913).

18394007 is an equidigital number, since it uses as much as digits as its factorization.

18394007 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48912.

The product of its (nonzero) digits is 6048, while the sum is 32.

The square root of 18394007 is about 4288.8234983501. The cubic root of 18394007 is about 263.9725589399.

The spelling of 18394007 in words is "eighteen million, three hundred ninety-four thousand, seven".