18703930 has 16 divisors (see below), whose sum is σ = 38476800. Its totient is φ = 6412752.

The previous prime is 18703897. The next prime is 18703931. The reversal of 18703930 is 3930781.

It is a junction number, because it is equal to n+sod(n) for n = 18703892 and 18703901.

It is not an unprimeable number, because it can be changed into a prime (18703931) 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 7 ways as a sum of consecutive naturals, for example, 133530 + ... + 133669.

It is an arithmetic number, because the mean of its divisors is an integer number (2404800).

Almost surely, 2^18703930 is an apocalyptic number.

18703930 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

18703930 is an abundant number, since it is smaller than the sum of its proper divisors (19772870).

18703930 is a wasteful number, since it uses less digits than its factorization.

18703930 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 267213.

The product of its (nonzero) digits is 4536, while the sum is 31.

The square root of 18703930 is about 4324.8040418035. The cubic root of 18703930 is about 265.4468785991.

The spelling of 18703930 in words is "eighteen million, seven hundred three thousand, nine hundred thirty".