18693140201 has 2 divisors, whose sum is σ = 18693140202. Its totient is φ = 18693140200.

The previous prime is 18693140173. The next prime is 18693140203. The reversal of 18693140201 is 10204139681.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 18571148176 + 121992025 = 136276^2 + 11045^2 .

It is a cyclic number.

It is not a de Polignac number, because 18693140201 - 2¹⁰ = 18693139177 is a prime.

It is a Sophie Germain prime.

Together with 18693140203, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (18693140203) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9346570100 + 9346570101.

It is an arithmetic number, because the mean of its divisors is an integer number (9346570101).

Almost surely, 2^18693140201 is an apocalyptic number.

It is an amenable number.

18693140201 is a deficient number, since it is larger than the sum of its proper divisors (1).

18693140201 is an equidigital number, since it uses as much as digits as its factorization.

18693140201 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10368, while the sum is 35.

Adding to 18693140201 its reverse (10204139681), we get a palindrome (28897279882).

The spelling of 18693140201 in words is "eighteen billion, six hundred ninety-three million, one hundred forty thousand, two hundred one".