18432901 has 2 divisors, whose sum is σ = 18432902. Its totient is φ = 18432900.

The previous prime is 18432871. The next prime is 18432917. The reversal of 18432901 is 10923481.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11383876 + 7049025 = 3374^2 + 2655^2 .

It is a cyclic number.

It is not a de Polignac number, because 18432901 - 2⁹ = 18432389 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 18432901.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18432971) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9216450 + 9216451.

It is an arithmetic number, because the mean of its divisors is an integer number (9216451).

Almost surely, 2^18432901 is an apocalyptic number.

It is an amenable number.

18432901 is a deficient number, since it is larger than the sum of its proper divisors (1).

18432901 is an equidigital number, since it uses as much as digits as its factorization.

18432901 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1728, while the sum is 28.

The square root of 18432901 is about 4293.3554476656. The cubic root of 18432901 is about 264.1584840030.

The spelling of 18432901 in words is "eighteen million, four hundred thirty-two thousand, nine hundred one".