18534207997368 has 96 divisors (see below), whose sum is σ = 57370701797760. Its totient is φ = 5295218909760.

The previous prime is 18534207997363. The next prime is 18534207997391. The reversal of 18534207997368 is 86379970243581.

18534207997368 is a `hidden beast` number, since 1 + 8 + 5 + 3 + 420 + 79 + 9 + 73 + 68 = 666.

It is a Harshad number since it is a multiple of its sum of digits (72).

It is a junction number, because it is equal to n+sod(n) for n = 18534207997296 and 18534207997305.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18534207997363) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 9100671 + ... + 10949457.

It is an arithmetic number, because the mean of its divisors is an integer number (597611477060).

It is a 1-persistent number, because it is pandigital, but 2⋅18534207997368 = 37068415994736 is not.

Almost surely, 2^{18534207997368} is an apocalyptic number.

18534207997368 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

18534207997368 is an abundant number, since it is smaller than the sum of its proper divisors (38836493800392).

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

18534207997368 is a wasteful number, since it uses less digits than its factorization.

18534207997368 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1868697 (or 1868690 counting only the distinct ones).

The product of its (nonzero) digits is 548674560, while the sum is 72.

The spelling of 18534207997368 in words is "eighteen trillion, five hundred thirty-four billion, two hundred seven million, nine hundred ninety-seven thousand, three hundred sixty-eight".