18078497140 has 24 divisors (see below), whose sum is σ = 41416193952. Its totient is φ = 6573998880.

The previous prime is 18078497113. The next prime is 18078497141. The reversal of 18078497140 is 4179487081.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18078497141) 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, 41087274 + ... + 41087713.

It is an arithmetic number, because the mean of its divisors is an integer number (1725674748).

Almost surely, 2^18078497140 is an apocalyptic number.

18078497140 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18078497140 is an abundant number, since it is smaller than the sum of its proper divisors (23337696812).

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

18078497140 is a wasteful number, since it uses less digits than its factorization.

18078497140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 82175007 (or 82175005 counting only the distinct ones).

The product of its (nonzero) digits is 451584, while the sum is 49.

The spelling of 18078497140 in words is "eighteen billion, seventy-eight million, four hundred ninety-seven thousand, one hundred forty".