13985643918 has 64 divisors (see below), whose sum is σ = 30085920000. Its totient is φ = 4321050624.

The previous prime is 13985643913. The next prime is 13985643923. The reversal of 13985643918 is 81934658931.

It is an interprime number because it is at equal distance from previous prime (13985643913) and next prime (13985643923).

It is a Harshad number since it is a multiple of its sum of digits (57).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13985643913) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1131918 + ... + 1144206.

It is an arithmetic number, because the mean of its divisors is an integer number (470092500).

Almost surely, 2^13985643918 is an apocalyptic number.

13985643918 is an abundant number, since it is smaller than the sum of its proper divisors (16100276082).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

13985643918 is a wasteful number, since it uses less digits than its factorization.

13985643918 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12529.

The product of its digits is 5598720, while the sum is 57.

The spelling of 13985643918 in words is "thirteen billion, nine hundred eighty-five million, six hundred forty-three thousand, nine hundred eighteen".