18164630 has 16 divisors (see below), whose sum is σ = 35668944. Its totient is φ = 6605280.

The previous prime is 18164623. The next prime is 18164639. The reversal of 18164630 is 3646181.

It is a junction number, because it is equal to n+sod(n) for n = 18164593 and 18164602.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18164639) 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, 82457 + ... + 82676.

It is an arithmetic number, because the mean of its divisors is an integer number (2229309).

Almost surely, 2^18164630 is an apocalyptic number.

18164630 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

18164630 is a deficient number, since it is larger than the sum of its proper divisors (17504314).

18164630 is a wasteful number, since it uses less digits than its factorization.

18164630 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 165151.

The product of its (nonzero) digits is 3456, while the sum is 29.

The square root of 18164630 is about 4261.9983575783. The cubic root of 18164630 is about 262.8707022497.

It can be divided in two parts, 1816 and 4630, that added together give a palindrome (6446).

The spelling of 18164630 in words is "eighteen million, one hundred sixty-four thousand, six hundred thirty".