18466625 has 16 divisors (see below), whose sum is σ = 23179728. Its totient is φ = 14688000.

The previous prime is 18466621. The next prime is 18466633. The reversal of 18466625 is 52666481.

It can be written as a sum of positive squares in 8 ways, for example, as 10195249 + 8271376 = 3193^2 + 2876^2 .

It is not a de Polignac number, because 18466625 - 2² = 18466621 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18466621) by changing a digit.

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, 29819 + ... + 30431.

It is an arithmetic number, because the mean of its divisors is an integer number (1448733).

Almost surely, 2^18466625 is an apocalyptic number.

It is an amenable number.

18466625 is a deficient number, since it is larger than the sum of its proper divisors (4713103).

18466625 is an equidigital number, since it uses as much as digits as its factorization.

18466625 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 869 (or 859 counting only the distinct ones).

The product of its digits is 69120, while the sum is 38.

The square root of 18466625 is about 4297.2811171716. The cubic root of 18466625 is about 264.3194833193.

It can be divided in two parts, 18466 and 625, that added together give a palindrome (19091).

The spelling of 18466625 in words is "eighteen million, four hundred sixty-six thousand, six hundred twenty-five".