18803830 has 16 divisors (see below), whose sum is σ = 34673184. Its totient is φ = 7337920.

The previous prime is 18803821. The next prime is 18803833. The reversal of 18803830 is 3830881.

It is a junction number, because it is equal to n+sod(n) for n = 18803792 and 18803801.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18803833) 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, 22522 + ... + 23341.

It is an arithmetic number, because the mean of its divisors is an integer number (2167074).

Almost surely, 2^18803830 is an apocalyptic number.

18803830 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

18803830 is a deficient number, since it is larger than the sum of its proper divisors (15869354).

18803830 is a wasteful number, since it uses less digits than its factorization.

18803830 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45911.

The product of its (nonzero) digits is 4608, while the sum is 31.

The square root of 18803830 is about 4336.3383170597. The cubic root of 18803830 is about 265.9186345446.

The spelling of 18803830 in words is "eighteen million, eight hundred three thousand, eight hundred thirty".