18806730 has 32 divisors (see below), whose sum is σ = 46358784. Its totient is φ = 4879296.

The previous prime is 18806719. The next prime is 18806731. The reversal of 18806730 is 3760881.

18806730 is nontrivially palindromic in base 12.

It is a junction number, because it is equal to n+sod(n) for n = 18806691 and 18806700.

It is not an unprimeable number, because it can be changed into a prime (18806731) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7362 + ... + 9581.

It is an arithmetic number, because the mean of its divisors is an integer number (1448712).

Almost surely, 2^18806730 is an apocalyptic number.

18806730 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

18806730 is an abundant number, since it is smaller than the sum of its proper divisors (27552054).

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

18806730 is a wasteful number, since it uses less digits than its factorization.

18806730 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16990.

The product of its (nonzero) digits is 8064, while the sum is 33.

The square root of 18806730 is about 4336.6726876720. The cubic root of 18806730 is about 265.9323041782.

The spelling of 18806730 in words is "eighteen million, eight hundred six thousand, seven hundred thirty".