18703909247 has 2 divisors, whose sum is σ = 18703909248. Its totient is φ = 18703909246.

The previous prime is 18703909193. The next prime is 18703909313. The reversal of 18703909247 is 74290930781.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 18703909247 - 2²⁴ = 18687132031 is a prime.

It is a super-2 number, since 2×18703909247² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 18703909195 and 18703909204.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18703909447) 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, 9351954623 + 9351954624.

It is an arithmetic number, because the mean of its divisors is an integer number (9351954624).

Almost surely, 2^18703909247 is an apocalyptic number.

18703909247 is a deficient number, since it is larger than the sum of its proper divisors (1).

18703909247 is an equidigital number, since it uses as much as digits as its factorization.

18703909247 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 762048, while the sum is 50.

The spelling of 18703909247 in words is "eighteen billion, seven hundred three million, nine hundred nine thousand, two hundred forty-seven".