20110213 has 4 divisors (see below), whose sum is σ = 20600748. Its totient is φ = 19619680.

The previous prime is 20110183. The next prime is 20110217. The reversal of 20110213 is 31201102.

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 1979649 + 18130564 = 1407^2 + 4258^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20110213 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20110213.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20110217) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 245206 + ... + 245287.

It is an arithmetic number, because the mean of its divisors is an integer number (5150187).

Almost surely, 2^20110213 is an apocalyptic number.

It is an amenable number.

20110213 is a deficient number, since it is larger than the sum of its proper divisors (490535).

20110213 is an equidigital number, since it uses as much as digits as its factorization.

20110213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 490534.

The product of its (nonzero) digits is 12, while the sum is 10.

The square root of 20110213 is about 4484.4412137969. The cubic root of 20110213 is about 271.9394554185.

Adding to 20110213 its reverse (31201102), we get a palindrome (51311315).

The spelling of 20110213 in words is "twenty million, one hundred ten thousand, two hundred thirteen".