18956681107 has 48 divisors (see below), whose sum is σ = 24361407840. Its totient is φ = 14613032448.

The previous prime is 18956681101. The next prime is 18956681123. The reversal of 18956681107 is 70118665981.

It is not a de Polignac number, because 18956681107 - 2¹⁹ = 18956156819 is a prime.

It is not an unprimeable number, because it can be changed into a prime (18956681101) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 16790119 + ... + 16791247.

It is an arithmetic number, because the mean of its divisors is an integer number (507529330).

Almost surely, 2^18956681107 is an apocalyptic number.

18956681107 is a deficient number, since it is larger than the sum of its proper divisors (5404726733).

18956681107 is a wasteful number, since it uses less digits than its factorization.

18956681107 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1812 (or 1805 counting only the distinct ones).

The product of its (nonzero) digits is 725760, while the sum is 52.

The spelling of 18956681107 in words is "eighteen billion, nine hundred fifty-six million, six hundred eighty-one thousand, one hundred seven".