39818913107 has 2 divisors, whose sum is σ = 39818913108. Its totient is φ = 39818913106.

The previous prime is 39818913089. The next prime is 39818913133. The reversal of 39818913107 is 70131981893.

It is a weak prime.

It is an emirp because it is prime and its reverse (70131981893) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 39818913107 - 2²⁰ = 39817864531 is a prime.

It is not a weakly prime, because it can be changed into another prime (39818913307) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19909456553 + 19909456554.

It is an arithmetic number, because the mean of its divisors is an integer number (19909456554).

Almost surely, 2^39818913107 is an apocalyptic number.

39818913107 is a deficient number, since it is larger than the sum of its proper divisors (1).

39818913107 is an equidigital number, since it uses as much as digits as its factorization.

39818913107 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 326592, while the sum is 50.

The spelling of 39818913107 in words is "thirty-nine billion, eight hundred eighteen million, nine hundred thirteen thousand, one hundred seven".