18405007 has 2 divisors, whose sum is σ = 18405008. Its totient is φ = 18405006.

The previous prime is 18404987. The next prime is 18405011. The reversal of 18405007 is 70050481.

It is a strong prime.

It is an emirp because it is prime and its reverse (70050481) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-18405007 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18405017) 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 as a sum of consecutive naturals, namely, 9202503 + 9202504.

It is an arithmetic number, because the mean of its divisors is an integer number (9202504).

Almost surely, 2^18405007 is an apocalyptic number.

18405007 is a deficient number, since it is larger than the sum of its proper divisors (1).

18405007 is an equidigital number, since it uses as much as digits as its factorization.

18405007 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1120, while the sum is 25.

The square root of 18405007 is about 4290.1057096533. The cubic root of 18405007 is about 264.0251688202.

Adding to 18405007 its reverse (70050481), we get a palindrome (88455488).

The spelling of 18405007 in words is "eighteen million, four hundred five thousand, seven".