18859734107 has 2 divisors, whose sum is σ = 18859734108. Its totient is φ = 18859734106.

The previous prime is 18859734073. The next prime is 18859734161. The reversal of 18859734107 is 70143795881.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-18859734107 is a prime.

It is not a weakly prime, because it can be changed into another prime (18859734407) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9429867053 + 9429867054.

It is an arithmetic number, because the mean of its divisors is an integer number (9429867054).

Almost surely, 2^18859734107 is an apocalyptic number.

18859734107 is a deficient number, since it is larger than the sum of its proper divisors (1).

18859734107 is an equidigital number, since it uses as much as digits as its factorization.

18859734107 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1693440, while the sum is 53.

The spelling of 18859734107 in words is "eighteen billion, eight hundred fifty-nine million, seven hundred thirty-four thousand, one hundred seven".