18436801 has 2 divisors, whose sum is σ = 18436802. Its totient is φ = 18436800.

The previous prime is 18436799. The next prime is 18436811. The reversal of 18436801 is 10863481.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 18105025 + 331776 = 4255^2 + 576^2 .

It is a cyclic number.

It is not a de Polignac number, because 18436801 - 2¹ = 18436799 is a prime.

It is a super-2 number, since 2×18436801² = 679831262227202, which contains 22 as substring.

Together with 18436799, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (18436811) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9218400 + 9218401.

It is an arithmetic number, because the mean of its divisors is an integer number (9218401).

Almost surely, 2^18436801 is an apocalyptic number.

It is an amenable number.

18436801 is a deficient number, since it is larger than the sum of its proper divisors (1).

18436801 is an equidigital number, since it uses as much as digits as its factorization.

18436801 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4608, while the sum is 31.

The square root of 18436801 is about 4293.8096138511. The cubic root of 18436801 is about 264.1771127480.

The spelling of 18436801 in words is "eighteen million, four hundred thirty-six thousand, eight hundred one".