20228713 has 2 divisors, whose sum is σ = 20228714. Its totient is φ = 20228712.

The previous prime is 20228701. The next prime is 20228723. The reversal of 20228713 is 31782202.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 19254544 + 974169 = 4388^2 + 987^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20228713 is a prime.

It is not a weakly prime, because it can be changed into another prime (20228723) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10114356 + 10114357.

It is an arithmetic number, because the mean of its divisors is an integer number (10114357).

Almost surely, 2^20228713 is an apocalyptic number.

It is an amenable number.

20228713 is a deficient number, since it is larger than the sum of its proper divisors (1).

20228713 is an equidigital number, since it uses as much as digits as its factorization.

20228713 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1344, while the sum is 25.

The square root of 20228713 is about 4497.6341558646. The cubic root of 20228713 is about 272.4725466830.

The spelling of 20228713 in words is "twenty million, two hundred twenty-eight thousand, seven hundred thirteen".