18184873869 has 16 divisors (see below), whose sum is σ = 27597642240. Its totient is φ = 11827559520.

The previous prime is 18184873807. The next prime is 18184873933. The reversal of 18184873869 is 96837848181.

It is a de Polignac number, because none of the positive numbers 2^k-18184873869 is a prime.

It is a super-2 number, since 2×18184873869² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18184873969) 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, 8212477 + ... + 8214690.

It is an arithmetic number, because the mean of its divisors is an integer number (1724852640).

Almost surely, 2^18184873869 is an apocalyptic number.

It is an amenable number.

18184873869 is a deficient number, since it is larger than the sum of its proper divisors (9412768371).

18184873869 is a wasteful number, since it uses less digits than its factorization.

18184873869 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16427217 (or 16427211 counting only the distinct ones).

The product of its digits is 18579456, while the sum is 63.

The spelling of 18184873869 in words is "eighteen billion, one hundred eighty-four million, eight hundred seventy-three thousand, eight hundred sixty-nine".