18727072 has 96 divisors (see below), whose sum is σ = 46569600. Its totient is φ = 7216128.

The previous prime is 18727067. The next prime is 18727091. The reversal of 18727072 is 27072781.

It is an alternating number because its digits alternate between odd and even.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 171754 + ... + 171862.

It is an arithmetic number, because the mean of its divisors is an integer number (485100).

Almost surely, 2^18727072 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 18727072, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23284800).

18727072 is an abundant number, since it is smaller than the sum of its proper divisors (27842528).

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

18727072 is a wasteful number, since it uses less digits than its factorization.

18727072 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 198 (or 190 counting only the distinct ones).

The product of its (nonzero) digits is 10976, while the sum is 34.

The square root of 18727072 is about 4327.4787116750. The cubic root of 18727072 is about 265.5563108571.

The spelling of 18727072 in words is "eighteen million, seven hundred twenty-seven thousand, seventy-two".