18708678 has 32 divisors (see below), whose sum is σ = 42203520. Its totient is φ = 6141960.

The previous prime is 18708671. The next prime is 18708691. The reversal of 18708678 is 87680781.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18708671) 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, 1033 + ... + 6203.

It is an arithmetic number, because the mean of its divisors is an integer number (1318860).

Almost surely, 2^18708678 is an apocalyptic number.

18708678 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 18708678, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (21101760).

18708678 is an abundant number, since it is smaller than the sum of its proper divisors (23494842).

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

18708678 is a wasteful number, since it uses less digits than its factorization.

18708678 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5249 (or 5243 counting only the distinct ones).

The product of its (nonzero) digits is 150528, while the sum is 45.

The square root of 18708678 is about 4325.3529335766. The cubic root of 18708678 is about 265.4693379637.

The spelling of 18708678 in words is "eighteen million, seven hundred eight thousand, six hundred seventy-eight".