18103936247 has 4 divisors (see below), whose sum is σ = 18104305560. Its totient is φ = 18103566936.

The previous prime is 18103936237. The next prime is 18103936283. The reversal of 18103936247 is 74263930181.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 18103936247 - 2⁶ = 18103936183 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 18103936198 and 18103936207.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18103936237) 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 in 3 ways as a sum of consecutive naturals, for example, 97373 + ... + 213750.

It is an arithmetic number, because the mean of its divisors is an integer number (4526076390).

Almost surely, 2^18103936247 is an apocalyptic number.

18103936247 is a deficient number, since it is larger than the sum of its proper divisors (369313).

18103936247 is an equidigital number, since it uses as much as digits as its factorization.

18103936247 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 369312.

The product of its (nonzero) digits is 217728, while the sum is 44.

The spelling of 18103936247 in words is "eighteen billion, one hundred three million, nine hundred thirty-six thousand, two hundred forty-seven".