18375007 has 4 divisors (see below), whose sum is σ = 21000016. Its totient is φ = 15750000.

The previous prime is 18374987. The next prime is 18375053. The reversal of 18375007 is 70057381.

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

It is not a de Polignac number, because 18375007 - 2⁷ = 18374879 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 18375007.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18375107) 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, 1312494 + ... + 1312507.

It is an arithmetic number, because the mean of its divisors is an integer number (5250004).

Almost surely, 2^18375007 is an apocalyptic number.

18375007 is a deficient number, since it is larger than the sum of its proper divisors (2625009).

18375007 is an equidigital number, since it uses as much as digits as its factorization.

18375007 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2625008.

The product of its (nonzero) digits is 5880, while the sum is 31.

The square root of 18375007 is about 4286.6078663671. The cubic root of 18375007 is about 263.8816379040.

The spelling of 18375007 in words is "eighteen million, three hundred seventy-five thousand, seven".