18516652 has 48 divisors (see below), whose sum is σ = 40965120. Its totient is φ = 7113600.

The previous prime is 18516647. The next prime is 18516713. The reversal of 18516652 is 25661581.

It is a happy number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 23952 + ... + 24712.

It is an arithmetic number, because the mean of its divisors is an integer number (853440).

Almost surely, 2^18516652 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 18516652, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (20482560).

18516652 is an abundant number, since it is smaller than the sum of its proper divisors (22448468).

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

18516652 is a wasteful number, since it uses less digits than its factorization.

18516652 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 862 (or 860 counting only the distinct ones).

The product of its digits is 14400, while the sum is 34.

The square root of 18516652 is about 4303.0979538003. The cubic root of 18516652 is about 264.5579529557.

Subtracting 18516652 from its reverse (25661581), we obtain a square (7144929 = 2673²).

The spelling of 18516652 in words is "eighteen million, five hundred sixteen thousand, six hundred fifty-two".