18693140203 has 2 divisors, whose sum is σ = 18693140204. Its totient is φ = 18693140202.

The previous prime is 18693140201. The next prime is 18693140251. The reversal of 18693140203 is 30204139681.

It is a weak prime.

It is an emirp because it is prime and its reverse (30204139681) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 18693140203 - 2¹ = 18693140201 is a prime.

Together with 18693140201, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (18693140201) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9346570101 + 9346570102.

It is an arithmetic number, because the mean of its divisors is an integer number (9346570102).

Almost surely, 2^18693140203 is an apocalyptic number.

18693140203 is a deficient number, since it is larger than the sum of its proper divisors (1).

18693140203 is an equidigital number, since it uses as much as digits as its factorization.

18693140203 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 31104, while the sum is 37.

Adding to 18693140203 its reverse (30204139681), we get a palindrome (48897279884).

The spelling of 18693140203 in words is "eighteen billion, six hundred ninety-three million, one hundred forty thousand, two hundred three".