18051001 has 2 divisors, whose sum is σ = 18051002. Its totient is φ = 18051000.

The previous prime is 18050999. The next prime is 18051031. The reversal of 18051001 is 10015081.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 18020025 + 30976 = 4245^2 + 176^2 .

It is a cyclic number.

It is not a de Polignac number, because 18051001 - 2¹ = 18050999 is a prime.

Together with 18050999, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (18051031) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9025500 + 9025501.

It is an arithmetic number, because the mean of its divisors is an integer number (9025501).

Almost surely, 2^18051001 is an apocalyptic number.

It is an amenable number.

18051001 is a deficient number, since it is larger than the sum of its proper divisors (1).

18051001 is an equidigital number, since it uses as much as digits as its factorization.

18051001 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 40, while the sum is 16.

The square root of 18051001 is about 4248.6469610924. The cubic root of 18051001 is about 262.3214253336.

Adding to 18051001 its reverse (10015081), we get a palindrome (28066082).

The spelling of 18051001 in words is "eighteen million, fifty-one thousand, one".