18471768 has 64 divisors (see below), whose sum is σ = 54024960. Its totient is φ = 5152896.

The previous prime is 18471767. The next prime is 18471773. The reversal of 18471768 is 86717481.

It is a happy number.

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18471767) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5946 + ... + 8502.

It is an arithmetic number, because the mean of its divisors is an integer number (844140).

Almost surely, 2^18471768 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18471768, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27012480).

18471768 is an abundant number, since it is smaller than the sum of its proper divisors (35553192).

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

18471768 is a wasteful number, since it uses less digits than its factorization.

18471768 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2616 (or 2612 counting only the distinct ones).

The product of its digits is 75264, while the sum is 42.

The square root of 18471768 is about 4297.8794771375. The cubic root of 18471768 is about 264.3440189148.

The spelling of 18471768 in words is "eighteen million, four hundred seventy-one thousand, seven hundred sixty-eight".