2133818 has 4 divisors (see below), whose sum is σ = 3200730. Its totient is φ = 1066908.

The previous prime is 2133811. The next prime is 2133821. The reversal of 2133818 is 8183312.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 1605289 + 528529 = 1267^2 + 727^2 .

It is not an unprimeable number, because it can be changed into a prime (2133811) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 533453 + ... + 533456.

2^2133818 is an apocalyptic number.

2133818 is a deficient number, since it is larger than the sum of its proper divisors (1066912).

2133818 is a wasteful number, since it uses less digits than its factorization.

2133818 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1066911.

The product of its digits is 1152, while the sum is 26.

The square root of 2133818 is about 1460.7593915495. The cubic root of 2133818 is about 128.7416659701.

The spelling of 2133818 in words is "two million, one hundred thirty-three thousand, eight hundred eighteen".