18212983 has 4 divisors (see below), whose sum is σ = 18222120. Its totient is φ = 18203848.

The previous prime is 18212981. The next prime is 18212993. The reversal of 18212983 is 38921281.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 18212983 - 2¹ = 18212981 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18212981) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 160 + ... + 6037.

It is an arithmetic number, because the mean of its divisors is an integer number (4555530).

Almost surely, 2^18212983 is an apocalyptic number.

18212983 is a deficient number, since it is larger than the sum of its proper divisors (9137).

18212983 is an equidigital number, since it uses as much as digits as its factorization.

18212983 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9136.

The product of its digits is 6912, while the sum is 34.

The square root of 18212983 is about 4267.6671613424. The cubic root of 18212983 is about 263.1037435224.

The spelling of 18212983 in words is "eighteen million, two hundred twelve thousand, nine hundred eighty-three".