1820202013 has 8 divisors (see below), whose sum is σ = 2136453632. Its totient is φ = 1518006096.

The previous prime is 1820202001. The next prime is 1820202017. The reversal of 1820202013 is 3102020281.

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

It is a cyclic number.

It is not a de Polignac number, because 1820202013 - 2²⁵ = 1786647581 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 (1820202017) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3513645 + ... + 3514162.

It is an arithmetic number, because the mean of its divisors is an integer number (267056704).

Almost surely, 2^1820202013 is an apocalyptic number.

It is an amenable number.

1820202013 is a deficient number, since it is larger than the sum of its proper divisors (316251619).

1820202013 is an equidigital number, since it uses as much as digits as its factorization.

1820202013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7027851.

The product of its (nonzero) digits is 192, while the sum is 19.

The square root of 1820202013 is about 42663.8255785859. The cubic root of 1820202013 is about 1220.9743208888.

Adding to 1820202013 its reverse (3102020281), we get a palindrome (4922222294).

The spelling of 1820202013 in words is "one billion, eight hundred twenty million, two hundred two thousand, thirteen".