18830401 has 2 divisors, whose sum is σ = 18830402. Its totient is φ = 18830400.

The previous prime is 18830389. The next prime is 18830429. The reversal of 18830401 is 10403881.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 16008001 + 2822400 = 4001^2 + 1680^2 .

It is a cyclic number.

It is not a de Polignac number, because 18830401 - 2⁵ = 18830369 is a prime.

It is not a weakly prime, because it can be changed into another prime (18830701) 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 as a sum of consecutive naturals, namely, 9415200 + 9415201.

It is an arithmetic number, because the mean of its divisors is an integer number (9415201).

Almost surely, 2^18830401 is an apocalyptic number.

It is an amenable number.

18830401 is a deficient number, since it is larger than the sum of its proper divisors (1).

18830401 is an equidigital number, since it uses as much as digits as its factorization.

18830401 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 768, while the sum is 25.

The square root of 18830401 is about 4339.4009955292. The cubic root of 18830401 is about 266.0438288719.

The spelling of 18830401 in words is "eighteen million, eight hundred thirty thousand, four hundred one".