20116213 has 8 divisors (see below), whose sum is σ = 21705656. Its totient is φ = 18532800.

The previous prime is 20116211. The next prime is 20116249. The reversal of 20116213 is 31261102.

It can be written as a sum of positive squares in 4 ways, for example, as 3526884 + 16589329 = 1878^2 + 4073^2 .

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

It is not a de Polignac number, because 20116213 - 2¹ = 20116211 is a prime.

It is a super-2 number, since 2×20116213² = 809324050922738, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20116211) 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, 7423 + ... + 9763.

It is an arithmetic number, because the mean of its divisors is an integer number (2713207).

Almost surely, 2^20116213 is an apocalyptic number.

It is an amenable number.

20116213 is a deficient number, since it is larger than the sum of its proper divisors (1589443).

20116213 is a wasteful number, since it uses less digits than its factorization.

20116213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3015.

The product of its (nonzero) digits is 72, while the sum is 16.

The square root of 20116213 is about 4485.1101435751. The cubic root of 20116213 is about 271.9664976398.

Adding to 20116213 its reverse (31261102), we get a palindrome (51377315).

The spelling of 20116213 in words is "twenty million, one hundred sixteen thousand, two hundred thirteen".