18252007 has 4 divisors (see below), whose sum is σ = 18269800. Its totient is φ = 18234216.

The previous prime is 18252001. The next prime is 18252023. The reversal of 18252007 is 70025281.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 70025281 = 139 ⋅503779.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-18252007 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 (18252001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7257 + ... + 9442.

It is an arithmetic number, because the mean of its divisors is an integer number (4567450).

Almost surely, 2^18252007 is an apocalyptic number.

18252007 is a deficient number, since it is larger than the sum of its proper divisors (17793).

18252007 is a wasteful number, since it uses less digits than its factorization.

18252007 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17792.

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

The square root of 18252007 is about 4272.2367677834. The cubic root of 18252007 is about 263.2915223190.

Adding to 18252007 its reverse (70025281), we get a palindrome (88277288).

The spelling of 18252007 in words is "eighteen million, two hundred fifty-two thousand, seven".