20375213 has 2 divisors, whose sum is σ = 20375214. Its totient is φ = 20375212.

The previous prime is 20375209. The next prime is 20375219. The reversal of 20375213 is 31257302.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 12411529 + 7963684 = 3523^2 + 2822^2 .

It is a cyclic number.

It is not a de Polignac number, because 20375213 - 2² = 20375209 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20375219) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10187606 + 10187607.

It is an arithmetic number, because the mean of its divisors is an integer number (10187607).

Almost surely, 2^20375213 is an apocalyptic number.

It is an amenable number.

20375213 is a deficient number, since it is larger than the sum of its proper divisors (1).

20375213 is an equidigital number, since it uses as much as digits as its factorization.

20375213 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1260, while the sum is 23.

The square root of 20375213 is about 4513.8911152131. The cubic root of 20375213 is about 273.1287303189.

The spelling of 20375213 in words is "twenty million, three hundred seventy-five thousand, two hundred thirteen".