18708536 has 64 divisors (see below), whose sum is σ = 44271360. Its totient is φ = 7260000.

The previous prime is 18708527. The next prime is 18708539. The reversal of 18708536 is 63580781.

It is a self number, because there is not a number n which added to its sum of digits gives 18708536.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18708539) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 74411 + ... + 74661.

It is an arithmetic number, because the mean of its divisors is an integer number (691740).

Almost surely, 2^18708536 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 18708536, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22135680).

18708536 is an abundant number, since it is smaller than the sum of its proper divisors (25562824).

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

18708536 is a wasteful number, since it uses less digits than its factorization.

18708536 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 297 (or 271 counting only the distinct ones).

The product of its (nonzero) digits is 40320, while the sum is 38.

The square root of 18708536 is about 4325.3365187000. The cubic root of 18708536 is about 265.4686663192.

The spelling of 18708536 in words is "eighteen million, seven hundred eight thousand, five hundred thirty-six".