18075020401 has 2 divisors, whose sum is σ = 18075020402. Its totient is φ = 18075020400.

The previous prime is 18075020393. The next prime is 18075020489. The reversal of 18075020401 is 10402057081.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 13894751376 + 4180269025 = 117876^2 + 64655^2 .

It is a cyclic number.

It is not a de Polignac number, because 18075020401 - 2³ = 18075020393 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 18075020401.

It is not a weakly prime, because it can be changed into another prime (18070020401) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9037510200 + 9037510201.

It is an arithmetic number, because the mean of its divisors is an integer number (9037510201).

Almost surely, 2^18075020401 is an apocalyptic number.

It is an amenable number.

18075020401 is a deficient number, since it is larger than the sum of its proper divisors (1).

18075020401 is an equidigital number, since it uses as much as digits as its factorization.

18075020401 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2240, while the sum is 28.

Adding to 18075020401 its reverse (10402057081), we get a palindrome (28477077482).

The spelling of 18075020401 in words is "eighteen billion, seventy-five million, twenty thousand, four hundred one".