18775923768 has 192 divisors, whose sum is σ = 63814383360. Its totient is φ = 5048925696.

The previous prime is 18775923679. The next prime is 18775923773. The reversal of 18775923768 is 86732957781.

18775923768 is a `hidden beast` number, since 1 + 8 + 7 + 7 + 592 + 37 + 6 + 8 = 666.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 190755 + ... + 271917.

It is an arithmetic number, because the mean of its divisors is an integer number (332366580).

Almost surely, 2^18775923768 is an apocalyptic number.

18775923768 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18775923768, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31907191680).

18775923768 is an abundant number, since it is smaller than the sum of its proper divisors (45038459592).

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

18775923768 is a wasteful number, since it uses less digits than its factorization.

18775923768 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 81208 (or 81192 counting only the distinct ones).

The product of its digits is 35562240, while the sum is 63.

The spelling of 18775923768 in words is "eighteen billion, seven hundred seventy-five million, nine hundred twenty-three thousand, seven hundred sixty-eight".