18730801 has 2 divisors, whose sum is σ = 18730802. Its totient is φ = 18730800.

The previous prime is 18730799. The next prime is 18730807. The reversal of 18730801 is 10803781.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 16613776 + 2117025 = 4076^2 + 1455^2 .

It is a cyclic number.

It is not a de Polignac number, because 18730801 - 2¹ = 18730799 is a prime.

It is a super-2 number, since 2×18730801² = 701685812203202, which contains 22 as substring.

Together with 18730799, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 18730801.

It is not a weakly prime, because it can be changed into another prime (18730807) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9365400 + 9365401.

It is an arithmetic number, because the mean of its divisors is an integer number (9365401).

Almost surely, 2^18730801 is an apocalyptic number.

18730801 is the 1936-th centered decagonal number.

It is an amenable number.

18730801 is a deficient number, since it is larger than the sum of its proper divisors (1).

18730801 is an equidigital number, since it uses as much as digits as its factorization.

18730801 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1344, while the sum is 28.

The square root of 18730801 is about 4327.9095415685. The cubic root of 18730801 is about 265.5739358541.

The spelling of 18730801 in words is "eighteen million, seven hundred thirty thousand, eight hundred one".