18340074040 has 32 divisors (see below), whose sum is σ = 41643756000. Its totient is φ = 7268724864.

The previous prime is 18340074037. The next prime is 18340074047. The reversal of 18340074040 is 4047004381.

It is a junction number, because it is equal to n+sod(n) for n = 18340073993 and 18340074011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18340074047) 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, 2098860 + ... + 2107579.

It is an arithmetic number, because the mean of its divisors is an integer number (1301367375).

Almost surely, 2^18340074040 is an apocalyptic number.

18340074040 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18340074040 is an abundant number, since it is smaller than the sum of its proper divisors (23303681960).

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

18340074040 is a wasteful number, since it uses less digits than its factorization.

18340074040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4206559 (or 4206555 counting only the distinct ones).

The product of its (nonzero) digits is 10752, while the sum is 31.

The spelling of 18340074040 in words is "eighteen billion, three hundred forty million, seventy-four thousand, forty".