20112213 has 8 divisors (see below), whose sum is σ = 29254176. Its totient is φ = 12189200.

The previous prime is 20112199. The next prime is 20112217. The reversal of 20112213 is 31221102.

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 20112213 - 2¹⁸ = 19850069 is a prime.

It is a super-2 number, since 2×20112213² = 809002223514738, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20112217) 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 7 ways as a sum of consecutive naturals, for example, 304698 + ... + 304763.

It is an arithmetic number, because the mean of its divisors is an integer number (3656772).

Almost surely, 2^20112213 is an apocalyptic number.

It is an amenable number.

20112213 is a deficient number, since it is larger than the sum of its proper divisors (9141963).

20112213 is a wasteful number, since it uses less digits than its factorization.

20112213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 609475.

The product of its (nonzero) digits is 24, while the sum is 12.

The square root of 20112213 is about 4484.6642014760. The cubic root of 20112213 is about 271.9484700899.

Adding to 20112213 its reverse (31221102), we get a palindrome (51333315).

Subtracting 20112213 from its reverse (31221102), we obtain a square (11108889 = 3333²).

It can be divided in two parts, 2011 and 2213, that added together give a palindrome (4224).

The spelling of 20112213 in words is "twenty million, one hundred twelve thousand, two hundred thirteen".