18088516 has 6 divisors (see below), whose sum is σ = 31654910. Its totient is φ = 9044256.

The previous prime is 18088507. The next prime is 18088519. The reversal of 18088516 is 61588081.

It can be written as a sum of positive squares in only one way, i.e., 9326916 + 8761600 = 3054^2 + 2960^2 .

It is a super-2 number, since 2×18088516² = 654388822164512, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (18088519) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2261061 + ... + 2261068.

Almost surely, 2^18088516 is an apocalyptic number.

It is an amenable number.

18088516 is a deficient number, since it is larger than the sum of its proper divisors (13566394).

18088516 is a wasteful number, since it uses less digits than its factorization.

18088516 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4522133 (or 4522131 counting only the distinct ones).

The product of its (nonzero) digits is 15360, while the sum is 37.

The square root of 18088516 is about 4253.0596045670. The cubic root of 18088516 is about 262.5030252108.

It can be divided in two parts, 180885 and 16, that added together give a triangular number (180901 = T₆₀₁).

The spelling of 18088516 in words is "eighteen million, eighty-eight thousand, five hundred sixteen".