18039120247 has 2 divisors, whose sum is σ = 18039120248. Its totient is φ = 18039120246.

The previous prime is 18039120217. The next prime is 18039120287. The reversal of 18039120247 is 74202193081.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 18039120247 - 2¹¹ = 18039118199 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18039120217) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9019560123 + 9019560124.

It is an arithmetic number, because the mean of its divisors is an integer number (9019560124).

Almost surely, 2^18039120247 is an apocalyptic number.

18039120247 is a deficient number, since it is larger than the sum of its proper divisors (1).

18039120247 is an equidigital number, since it uses as much as digits as its factorization.

18039120247 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 24192, while the sum is 37.

The spelling of 18039120247 in words is "eighteen billion, thirty-nine million, one hundred twenty thousand, two hundred forty-seven".