18145367684 has 24 divisors (see below), whose sum is σ = 32883942168. Its totient is φ = 8755568640.

The previous prime is 18145367683. The next prime is 18145367693. The reversal of 18145367684 is 48676354181.

It can be written as a sum of positive squares in 4 ways, for example, as 60497284 + 18084870400 = 7778^2 + 134480^2 .

It is a Harshad number since it is a multiple of its sum of digits (53).

It is not an unprimeable number, because it can be changed into a prime (18145367683) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 688637 + ... + 714500.

It is an arithmetic number, because the mean of its divisors is an integer number (1370164257).

Almost surely, 2^18145367684 is an apocalyptic number.

It is an amenable number.

18145367684 is a deficient number, since it is larger than the sum of its proper divisors (14738574484).

18145367684 is a wasteful number, since it uses less digits than its factorization.

18145367684 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1403255 (or 1403253 counting only the distinct ones).

The product of its digits is 3870720, while the sum is 53.

The spelling of 18145367684 in words is "eighteen billion, one hundred forty-five million, three hundred sixty-seven thousand, six hundred eighty-four".