18818343401456 has 20 divisors (see below), whose sum is σ = 36664230515400. Its totient is φ = 9356606494272.

The previous prime is 18818343401453. The next prime is 18818343401477. The reversal of 18818343401456 is 65410434381881.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18818343401453) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3285322451 + ... + 3285328178.

It is an arithmetic number, because the mean of its divisors is an integer number (1833211525770).

Almost surely, 2^{18818343401456} is an apocalyptic number.

18818343401456 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

18818343401456 is a deficient number, since it is larger than the sum of its proper divisors (17845887113944).

18818343401456 is a wasteful number, since it uses less digits than its factorization.

18818343401456 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6570650816 (or 6570650810 counting only the distinct ones).

The product of its (nonzero) digits is 8847360, while the sum is 56.

The spelling of 18818343401456 in words is "eighteen trillion, eight hundred eighteen billion, three hundred forty-three million, four hundred one thousand, four hundred fifty-six".