18031007 has 2 divisors, whose sum is σ = 18031008. Its totient is φ = 18031006.

The previous prime is 18030977. The next prime is 18031037. The reversal of 18031007 is 70013081.

It is a balanced prime because it is at equal distance from previous prime (18030977) and next prime (18031037).

It is a cyclic number.

It is not a de Polignac number, because 18031007 - 2²² = 13836703 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 18031007.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18031037) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9015503 + 9015504.

It is an arithmetic number, because the mean of its divisors is an integer number (9015504).

Almost surely, 2^18031007 is an apocalyptic number.

18031007 is a deficient number, since it is larger than the sum of its proper divisors (1).

18031007 is an equidigital number, since it uses as much as digits as its factorization.

18031007 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 168, while the sum is 20.

The square root of 18031007 is about 4246.2933247716. The cubic root of 18031007 is about 262.2245370366.

Adding to 18031007 its reverse (70013081), we get a palindrome (88044088).

The spelling of 18031007 in words is "eighteen million, thirty-one thousand, seven".