18946880903 has 2 divisors, whose sum is σ = 18946880904. Its totient is φ = 18946880902.

The previous prime is 18946880861. The next prime is 18946880993. The reversal of 18946880903 is 30908864981.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 18946880903 - 2²² = 18942686599 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18946880993) 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, 9473440451 + 9473440452.

It is an arithmetic number, because the mean of its divisors is an integer number (9473440452).

Almost surely, 2^18946880903 is an apocalyptic number.

18946880903 is a deficient number, since it is larger than the sum of its proper divisors (1).

18946880903 is an equidigital number, since it uses as much as digits as its factorization.

18946880903 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2985984, while the sum is 56.

The spelling of 18946880903 in words is "eighteen billion, nine hundred forty-six million, eight hundred eighty thousand, nine hundred three".