18716378356340 has 24 divisors (see below), whose sum is σ = 44919308055552. Its totient is φ = 6417044007840.

The previous prime is 18716378356339. The next prime is 18716378356367. The reversal of 18716378356340 is 4365387361781.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 66844208276 + ... + 66844208555.

It is an arithmetic number, because the mean of its divisors is an integer number (1871637835648).

Almost surely, 2^{18716378356340} is an apocalyptic number.

18716378356340 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18716378356340 is an abundant number, since it is smaller than the sum of its proper divisors (26202929699212).

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

18716378356340 is a wasteful number, since it uses less digits than its factorization.

18716378356340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 133688416847 (or 133688416845 counting only the distinct ones).

The product of its (nonzero) digits is 60963840, while the sum is 62.

The spelling of 18716378356340 in words is "eighteen trillion, seven hundred sixteen billion, three hundred seventy-eight million, three hundred fifty-six thousand, three hundred forty".