18771175056 has 160 divisors (see below), whose sum is σ = 53427437568. Its totient is φ = 5653186560.

The previous prime is 18771175043. The next prime is 18771175057. The reversal of 18771175056 is 65057117781.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a junction number, because it is equal to n+sod(n) for n = 18771174996 and 18771175014.

It is not an unprimeable number, because it can be changed into a prime (18771175057) by changing a digit.

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 31 ways as a sum of consecutive naturals, for example, 3209671 + ... + 3215513.

Almost surely, 2^18771175056 is an apocalyptic number.

18771175056 is a gapful number since it is divisible by the number (16) 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 18771175056, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26713718784).

18771175056 is an abundant number, since it is smaller than the sum of its proper divisors (34656262512).

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

18771175056 is a wasteful number, since it uses less digits than its factorization.

18771175056 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6029 (or 6023 counting only the distinct ones).

The product of its (nonzero) digits is 411600, while the sum is 48.

The spelling of 18771175056 in words is "eighteen billion, seven hundred seventy-one million, one hundred seventy-five thousand, fifty-six".