18423007 has 2 divisors, whose sum is σ = 18423008. Its totient is φ = 18423006.

The previous prime is 18422983. The next prime is 18423029. The reversal of 18423007 is 70032481.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 18423007 - 2¹¹ = 18420959 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18423047) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9211503 + 9211504.

It is an arithmetic number, because the mean of its divisors is an integer number (9211504).

Almost surely, 2^18423007 is an apocalyptic number.

18423007 is a deficient number, since it is larger than the sum of its proper divisors (1).

18423007 is an equidigital number, since it uses as much as digits as its factorization.

18423007 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1344, while the sum is 25.

The square root of 18423007 is about 4292.2030473872. The cubic root of 18423007 is about 264.1112125181. Note that the first 3 decimals are identical.

Adding to 18423007 its reverse (70032481), we get a palindrome (88455488).

The spelling of 18423007 in words is "eighteen million, four hundred twenty-three thousand, seven".