18943130 has 32 divisors (see below), whose sum is σ = 35138880. Its totient is φ = 7349760.

The previous prime is 18943129. The next prime is 18943147. The reversal of 18943130 is 3134981.

It is a junction number, because it is equal to n+sod(n) for n = 18943093 and 18943102.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 57065 + ... + 57395.

It is an arithmetic number, because the mean of its divisors is an integer number (1098090).

Almost surely, 2^18943130 is an apocalyptic number.

18943130 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

18943130 is a deficient number, since it is larger than the sum of its proper divisors (16195750).

18943130 is a wasteful number, since it uses less digits than its factorization.

18943130 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 494.

The product of its (nonzero) digits is 2592, while the sum is 29.

The square root of 18943130 is about 4352.3706184102. The cubic root of 18943130 is about 266.5736672232.

The spelling of 18943130 in words is "eighteen million, nine hundred forty-three thousand, one hundred thirty".