18725118 has 16 divisors (see below), whose sum is σ = 37537680. Its totient is φ = 6227136.

The previous prime is 18725111. The next prime is 18725123. The reversal of 18725118 is 81152781.

It is a super-2 number, since 2×18725118² = 701260088227848, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18725111) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 673 + ... + 6156.

It is an arithmetic number, because the mean of its divisors is an integer number (2346105).

Almost surely, 2^18725118 is an apocalyptic number.

18725118 is an abundant number, since it is smaller than the sum of its proper divisors (18812562).

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

18725118 is a wasteful number, since it uses less digits than its factorization.

18725118 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7291.

The product of its digits is 4480, while the sum is 33.

The square root of 18725118 is about 4327.2529392214. The cubic root of 18725118 is about 265.5470744056.

Adding to 18725118 its reverse (81152781), we get a palindrome (99877899).

The spelling of 18725118 in words is "eighteen million, seven hundred twenty-five thousand, one hundred eighteen".