18061508 has 12 divisors (see below), whose sum is σ = 31723692. Its totient is φ = 8997600.

The previous prime is 18061501. The next prime is 18061523. The reversal of 18061508 is 80516081.

It can be written as a sum of positive squares in 2 ways, for example, as 9193024 + 8868484 = 3032^2 + 2978^2 .

It is a hoax number, since the sum of its digits (29) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (18061501) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7043 + ... + 9258.

It is an arithmetic number, because the mean of its divisors is an integer number (2643641).

Almost surely, 2^18061508 is an apocalyptic number.

It is an amenable number.

18061508 is a deficient number, since it is larger than the sum of its proper divisors (13662184).

18061508 is a wasteful number, since it uses less digits than its factorization.

18061508 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16582 (or 16580 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 29.

The square root of 18061508 is about 4249.8832925152. The cubic root of 18061508 is about 262.3723121998.

Adding to 18061508 its reverse (80516081), we get a palindrome (98577589).

The spelling of 18061508 in words is "eighteen million, sixty-one thousand, five hundred eight".