2018813 has 4 divisors (see below), whose sum is σ = 2083968. Its totient is φ = 1953660.

The previous prime is 2018773. The next prime is 2018827. The reversal of 2018813 is 3188102.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 2018813 - 2⁶ = 2018749 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 (2018843) 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, 32531 + ... + 32592.

It is an arithmetic number, because the mean of its divisors is an integer number (520992).

2^2018813 is an apocalyptic number.

It is an amenable number.

2018813 is a deficient number, since it is larger than the sum of its proper divisors (65155).

2018813 is an equidigital number, since it uses as much as digits as its factorization.

2018813 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65154.

The product of its (nonzero) digits is 384, while the sum is 23.

The square root of 2018813 is about 1420.8493938486. The cubic root of 2018813 is about 126.3859209937.

The spelling of 2018813 in words is "two million, eighteen thousand, eight hundred thirteen".