18953619859 has 2 divisors, whose sum is σ = 18953619860. Its totient is φ = 18953619858.

The previous prime is 18953619847. The next prime is 18953619907. The reversal of 18953619859 is 95891635981.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 18953619859 - 2¹¹ = 18953617811 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 18953619859.

It is not a weakly prime, because it can be changed into another prime (18953613859) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9476809929 + 9476809930.

It is an arithmetic number, because the mean of its divisors is an integer number (9476809930).

Almost surely, 2^18953619859 is an apocalyptic number.

18953619859 is a deficient number, since it is larger than the sum of its proper divisors (1).

18953619859 is an equidigital number, since it uses as much as digits as its factorization.

18953619859 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 20995200, while the sum is 64.

The spelling of 18953619859 in words is "eighteen billion, nine hundred fifty-three million, six hundred nineteen thousand, eight hundred fifty-nine".