18835668423 has 32 divisors (see below), whose sum is σ = 32783143680. Its totient is φ = 10537434720.

The previous prime is 18835668407. The next prime is 18835668433. The reversal of 18835668423 is 32486653881.

18835668423 is a `hidden beast` number, since 188 + 35 + 6 + 6 + 8 + 423 = 666.

It is not a de Polignac number, because 18835668423 - 2⁴ = 18835668407 is a prime.

It is a super-4 number, since 4×18835668423⁴ (a number of 42 digits) contains 4444 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 18835668423.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18835668433) by changing a digit.

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, 2435361 + ... + 2443082.

It is an arithmetic number, because the mean of its divisors is an integer number (1024473240).

Almost surely, 2^18835668423 is an apocalyptic number.

18835668423 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

18835668423 is a deficient number, since it is larger than the sum of its proper divisors (13947475257).

18835668423 is a wasteful number, since it uses less digits than its factorization.

18835668423 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4878476 (or 4878470 counting only the distinct ones).

The product of its digits is 6635520, while the sum is 54.

The spelling of 18835668423 in words is "eighteen billion, eight hundred thirty-five million, six hundred sixty-eight thousand, four hundred twenty-three".