18973130 has 32 divisors (see below), whose sum is σ = 37558080. Its totient is φ = 6843520.

The previous prime is 18973093. The next prime is 18973151. The reversal of 18973130 is 3137981.

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, 14441 + ... + 15699.

It is an arithmetic number, because the mean of its divisors is an integer number (1173690).

Almost surely, 2^18973130 is an apocalyptic number.

18973130 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

18973130 is a deficient number, since it is larger than the sum of its proper divisors (18584950).

18973130 is a wasteful number, since it uses less digits than its factorization.

18973130 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1414.

The product of its (nonzero) digits is 4536, while the sum is 32.

The square root of 18973130 is about 4355.8156526648. The cubic root of 18973130 is about 266.7143161380.

The spelling of 18973130 in words is "eighteen million, nine hundred seventy-three thousand, one hundred thirty".