18982138 has 8 divisors (see below), whose sum is σ = 32540832. Its totient is φ = 8135196.

The previous prime is 18982127. The next prime is 18982141. The reversal of 18982138 is 83128981.

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

It is a self number, because there is not a number n which added to its sum of digits gives 18982138.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 677920 + ... + 677947.

It is an arithmetic number, because the mean of its divisors is an integer number (4067604).

Almost surely, 2^18982138 is an apocalyptic number.

18982138 is a deficient number, since it is larger than the sum of its proper divisors (13558694).

18982138 is a wasteful number, since it uses less digits than its factorization.

18982138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1355876.

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

The square root of 18982138 is about 4356.8495498468. The cubic root of 18982138 is about 266.7565193737.

The spelling of 18982138 in words is "eighteen million, nine hundred eighty-two thousand, one hundred thirty-eight".