18900007 has 8 divisors (see below), whose sum is σ = 22184096. Its totient is φ = 15761952.

The previous prime is 18899999. The next prime is 18900053. The reversal of 18900007 is 70000981.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 18900007 - 2³ = 18899999 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 (18900067) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 36228 + ... + 36745.

It is an arithmetic number, because the mean of its divisors is an integer number (2773012).

Almost surely, 2^18900007 is an apocalyptic number.

18900007 is a deficient number, since it is larger than the sum of its proper divisors (3284089).

18900007 is an equidigital number, since it uses as much as digits as its factorization.

18900007 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 73017.

The product of its (nonzero) digits is 504, while the sum is 25.

The square root of 18900007 is about 4347.4138289332. The cubic root of 18900007 is about 266.3712334081.

Adding to 18900007 its reverse (70000981), we get a palindrome (88900988).

The spelling of 18900007 in words is "eighteen million, nine hundred thousand, seven".