20002544213 has 4 divisors (see below), whose sum is σ = 20011362060. Its totient is φ = 19993726368.

The previous prime is 20002544201. The next prime is 20002544231. The reversal of 20002544213 is 31244520002.

It is a happy number.

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

It can be written as a sum of positive squares in 2 ways, for example, as 1686169969 + 18316374244 = 41063^2 + 135338^2 .

It is a cyclic number.

It is not a de Polignac number, because 20002544213 - 2⁴ = 20002544197 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20002544813) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4405520 + ... + 4410057.

It is an arithmetic number, because the mean of its divisors is an integer number (5002840515).

Almost surely, 2^20002544213 is an apocalyptic number.

It is an amenable number.

20002544213 is a deficient number, since it is larger than the sum of its proper divisors (8817847).

20002544213 is an equidigital number, since it uses as much as digits as its factorization.

20002544213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8817846.

The product of its (nonzero) digits is 1920, while the sum is 23.

The spelling of 20002544213 in words is "twenty billion, two million, five hundred forty-four thousand, two hundred thirteen".