18950367893 has 2 divisors, whose sum is σ = 18950367894. Its totient is φ = 18950367892.

The previous prime is 18950367841. The next prime is 18950367911. The reversal of 18950367893 is 39876305981.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 10894766884 + 8055601009 = 104378^2 + 89753^2 .

It is a cyclic number.

It is not a de Polignac number, because 18950367893 - 2⁶ = 18950367829 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18953367893) 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, 9475183946 + 9475183947.

It is an arithmetic number, because the mean of its divisors is an integer number (9475183947).

Almost surely, 2^18950367893 is an apocalyptic number.

It is an amenable number.

18950367893 is a deficient number, since it is larger than the sum of its proper divisors (1).

18950367893 is an equidigital number, since it uses as much as digits as its factorization.

18950367893 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 9797760, while the sum is 59.

The spelling of 18950367893 in words is "eighteen billion, nine hundred fifty million, three hundred sixty-seven thousand, eight hundred ninety-three".