20420213 has 8 divisors (see below), whose sum is σ = 23587200. Its totient is φ = 17471680.

The previous prime is 20420209. The next prime is 20420219. The reversal of 20420213 is 31202402.

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 20420213 - 2² = 20420209 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 (20420219) 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, 54413 + ... + 54786.

It is an arithmetic number, because the mean of its divisors is an integer number (2948400).

Almost surely, 2^20420213 is an apocalyptic number.

It is an amenable number.

20420213 is a deficient number, since it is larger than the sum of its proper divisors (3166987).

20420213 is a wasteful number, since it uses less digits than its factorization.

20420213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 109227.

The product of its (nonzero) digits is 96, while the sum is 14.

The square root of 20420213 is about 4518.8729789628. The cubic root of 20420213 is about 273.3296567355.

Adding to 20420213 its reverse (31202402), we get a palindrome (51622615).

The spelling of 20420213 in words is "twenty million, four hundred twenty thousand, two hundred thirteen".