18144901 has 2 divisors, whose sum is σ = 18144902. Its totient is φ = 18144900.

The previous prime is 18144887. The next prime is 18144949. The reversal of 18144901 is 10944181.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 12068676 + 6076225 = 3474^2 + 2465^2 .

It is a cyclic number.

It is not a de Polignac number, because 18144901 - 2⁵ = 18144869 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 18144901.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18144991) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9072450 + 9072451.

It is an arithmetic number, because the mean of its divisors is an integer number (9072451).

Almost surely, 2^18144901 is an apocalyptic number.

It is an amenable number.

18144901 is a deficient number, since it is larger than the sum of its proper divisors (1).

18144901 is an equidigital number, since it uses as much as digits as its factorization.

18144901 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1152, while the sum is 28.

The square root of 18144901 is about 4259.6832041831. The cubic root of 18144901 is about 262.7754979098.

The spelling of 18144901 in words is "eighteen million, one hundred forty-four thousand, nine hundred one".