18465687768 has 64 divisors (see below), whose sum is σ = 50449576320. Its totient is φ = 5585817600.

The previous prime is 18465687767. The next prime is 18465687787. The reversal of 18465687768 is 86778656481.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (66).

It is a junction number, because it is equal to n+sod(n) for n = 18465687699 and 18465687708.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18465687763) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 89496 + ... + 211992.

It is an arithmetic number, because the mean of its divisors is an integer number (788274630).

Almost surely, 2^18465687768 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18465687768, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25224788160).

18465687768 is an abundant number, since it is smaller than the sum of its proper divisors (31983888552).

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

18465687768 is a wasteful number, since it uses less digits than its factorization.

18465687768 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 123088 (or 123084 counting only the distinct ones).

The product of its digits is 108380160, while the sum is 66.

The spelling of 18465687768 in words is "eighteen billion, four hundred sixty-five million, six hundred eighty-seven thousand, seven hundred sixty-eight".