18128801 has 2 divisors, whose sum is σ = 18128802. Its totient is φ = 18128800.

The previous prime is 18128791. The next prime is 18128813. The reversal of 18128801 is 10882181.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 9579025 + 8549776 = 3095^2 + 2924^2 .

It is a cyclic number.

It is not a de Polignac number, because 18128801 - 2¹⁸ = 17866657 is a prime.

It is not a weakly prime, because it can be changed into another prime (18128821) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9064400 + 9064401.

It is an arithmetic number, because the mean of its divisors is an integer number (9064401).

Almost surely, 2^18128801 is an apocalyptic number.

It is an amenable number.

18128801 is a deficient number, since it is larger than the sum of its proper divisors (1).

18128801 is an equidigital number, since it uses as much as digits as its factorization.

18128801 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1024, while the sum is 29.

The square root of 18128801 is about 4257.7929728910. The cubic root of 18128801 is about 262.6977545366.

It can be divided in two parts, 181 and 28801, that added together give a palindrome (28982).

The spelling of 18128801 in words is "eighteen million, one hundred twenty-eight thousand, eight hundred one".