18713830 has 8 divisors (see below), whose sum is σ = 33684912. Its totient is φ = 7485528.

The previous prime is 18713819. The next prime is 18713839. The reversal of 18713830 is 3831781.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 18713792 and 18713801.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18713839) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 935682 + ... + 935701.

It is an arithmetic number, because the mean of its divisors is an integer number (4210614).

Almost surely, 2^18713830 is an apocalyptic number.

18713830 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

18713830 is a deficient number, since it is larger than the sum of its proper divisors (14971082).

18713830 is a wasteful number, since it uses less digits than its factorization.

18713830 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1871390.

The product of its (nonzero) digits is 4032, while the sum is 31.

The square root of 18713830 is about 4325.9484509180. The cubic root of 18713830 is about 265.4937040628.

The spelling of 18713830 in words is "eighteen million, seven hundred thirteen thousand, eight hundred thirty".