18831982 has 16 divisors (see below), whose sum is σ = 30502080. Its totient is φ = 8668512.

The previous prime is 18831959. The next prime is 18832003. The reversal of 18831982 is 28913881.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12523 + ... + 13945.

It is an arithmetic number, because the mean of its divisors is an integer number (1906380).

Almost surely, 2^18831982 is an apocalyptic number.

18831982 is a deficient number, since it is larger than the sum of its proper divisors (11670098).

18831982 is a wasteful number, since it uses less digits than its factorization.

18831982 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1947.

The product of its digits is 27648, while the sum is 40.

The square root of 18831982 is about 4339.5831597055. The cubic root of 18831982 is about 266.0512743413.

The spelling of 18831982 in words is "eighteen million, eight hundred thirty-one thousand, nine hundred eighty-two".