2045018 has 4 divisors (see below), whose sum is σ = 3067530. Its totient is φ = 1022508.

The previous prime is 2045011. The next prime is 2045023. The reversal of 2045018 is 8105402.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 8105402 = 2 ⋅4052701.

It can be written as a sum of positive squares in only one way, i.e., 1760929 + 284089 = 1327^2 + 533^2 .

It is not an unprimeable number, because it can be changed into a prime (2045011) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 511253 + ... + 511256.

2^2045018 is an apocalyptic number.

2045018 is a deficient number, since it is larger than the sum of its proper divisors (1022512).

2045018 is a wasteful number, since it uses less digits than its factorization.

2045018 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1022511.

The product of its (nonzero) digits is 320, while the sum is 20.

The square root of 2045018 is about 1430.0412581461. The cubic root of 2045018 is about 126.9304184117.

The spelling of 2045018 in words is "two million, forty-five thousand, eighteen".