18313007 has 4 divisors (see below), whose sum is σ = 18944520. Its totient is φ = 17681496.

The previous prime is 18312997. The next prime is 18313027. The reversal of 18313007 is 70031381.

It is a happy number.

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 18313007 - 2¹⁰ = 18311983 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 (18313027) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 315713 + ... + 315770.

It is an arithmetic number, because the mean of its divisors is an integer number (4736130).

Almost surely, 2^18313007 is an apocalyptic number.

18313007 is a deficient number, since it is larger than the sum of its proper divisors (631513).

18313007 is an equidigital number, since it uses as much as digits as its factorization.

18313007 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 631512.

The product of its (nonzero) digits is 504, while the sum is 23.

The square root of 18313007 is about 4279.3699302584. The cubic root of 18313007 is about 263.5845115370.

Adding to 18313007 its reverse (70031381), we get a palindrome (88344388).

The spelling of 18313007 in words is "eighteen million, three hundred thirteen thousand, seven".