18688030 has 16 divisors (see below), whose sum is σ = 33973344. Its totient is φ = 7400800.

The previous prime is 18687973. The next prime is 18688037. The reversal of 18688030 is 3088681.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18688037) 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 7 ways as a sum of consecutive naturals, for example, 8242 + ... + 10261.

It is an arithmetic number, because the mean of its divisors is an integer number (2123334).

Almost surely, 2^18688030 is an apocalyptic number.

18688030 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

18688030 is a deficient number, since it is larger than the sum of its proper divisors (15285314).

18688030 is a wasteful number, since it uses less digits than its factorization.

18688030 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18611.

The product of its (nonzero) digits is 9216, while the sum is 34.

The square root of 18688030 is about 4322.9654173958. The cubic root of 18688030 is about 265.3716394756.

The spelling of 18688030 in words is "eighteen million, six hundred eighty-eight thousand, thirty".