20943213 has 8 divisors (see below), whose sum is σ = 28238400. Its totient is φ = 13805088.

The previous prime is 20943203. The next prime is 20943253. The reversal of 20943213 is 31234902.

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

It is not a de Polignac number, because 20943213 - 2¹⁸ = 20681069 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20943203) 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, 38953 + ... + 39486.

It is an arithmetic number, because the mean of its divisors is an integer number (3529800).

Almost surely, 2^20943213 is an apocalyptic number.

It is an amenable number.

20943213 is a deficient number, since it is larger than the sum of its proper divisors (7295187).

20943213 is an equidigital number, since it uses as much as digits as its factorization.

20943213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 78531.

The product of its (nonzero) digits is 1296, while the sum is 24.

The square root of 20943213 is about 4576.3755309196. The cubic root of 20943213 is about 275.6435089714.

The spelling of 20943213 in words is "twenty million, nine hundred forty-three thousand, two hundred thirteen".