18443315707 has 2 divisors, whose sum is σ = 18443315708. Its totient is φ = 18443315706.

The previous prime is 18443315699. The next prime is 18443315743. The reversal of 18443315707 is 70751334481.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 18443315707 - 2³ = 18443315699 is a prime.

It is not a weakly prime, because it can be changed into another prime (18443315767) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9221657853 + 9221657854.

It is an arithmetic number, because the mean of its divisors is an integer number (9221657854).

Almost surely, 2^18443315707 is an apocalyptic number.

18443315707 is a deficient number, since it is larger than the sum of its proper divisors (1).

18443315707 is an equidigital number, since it uses as much as digits as its factorization.

18443315707 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 282240, while the sum is 43.

The spelling of 18443315707 in words is "eighteen billion, four hundred forty-three million, three hundred fifteen thousand, seven hundred seven".