18723018056340 has 96 divisors (see below), whose sum is σ = 56595138485760. Its totient is φ = 4597474507776.

The previous prime is 18723018056339. The next prime is 18723018056377. The reversal of 18723018056340 is 4365081032781.

It is a self number, because there is not a number n which added to its sum of digits gives 18723018056340.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 29025564 + ... + 29663603.

It is an arithmetic number, because the mean of its divisors is an integer number (589532692560).

Almost surely, 2^{18723018056340} is an apocalyptic number.

18723018056340 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18723018056340 is an abundant number, since it is smaller than the sum of its proper divisors (37872120429420).

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

18723018056340 is a wasteful number, since it uses less digits than its factorization.

18723018056340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 58689601 (or 58689599 counting only the distinct ones).

The product of its (nonzero) digits is 967680, while the sum is 48.

The spelling of 18723018056340 in words is "eighteen trillion, seven hundred twenty-three billion, eighteen million, fifty-six thousand, three hundred forty".