20343213 has 12 divisors (see below), whose sum is σ = 32056128. Its totient is φ = 12329160.

The previous prime is 20343209. The next prime is 20343227. The reversal of 20343213 is 31234302.

It is not a de Polignac number, because 20343213 - 2² = 20343209 is a prime.

It is a plaindrome in base 16.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20343263) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 102645 + ... + 102842.

It is an arithmetic number, because the mean of its divisors is an integer number (2671344).

Almost surely, 2^20343213 is an apocalyptic number.

It is an amenable number.

20343213 is a deficient number, since it is larger than the sum of its proper divisors (11712915).

20343213 is a wasteful number, since it uses less digits than its factorization.

20343213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 205504 (or 205501 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 18.

The square root of 20343213 is about 4510.3451087472. The cubic root of 20343213 is about 272.9856692554.

Adding to 20343213 its reverse (31234302), we get a palindrome (51577515).

The spelling of 20343213 in words is "twenty million, three hundred forty-three thousand, two hundred thirteen".