20822393 has 2 divisors, whose sum is σ = 20822394. Its totient is φ = 20822392.

The previous prime is 20822371. The next prime is 20822407. The reversal of 20822393 is 39322802.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 18593344 + 2229049 = 4312^2 + 1493^2 .

It is a cyclic number.

It is not a de Polignac number, because 20822393 - 2¹² = 20818297 is a prime.

It is not a weakly prime, because it can be changed into another prime (20822323) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10411196 + 10411197.

It is an arithmetic number, because the mean of its divisors is an integer number (10411197).

Almost surely, 2^20822393 is an apocalyptic number.

It is an amenable number.

20822393 is a deficient number, since it is larger than the sum of its proper divisors (1).

20822393 is an equidigital number, since it uses as much as digits as its factorization.

20822393 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5184, while the sum is 29.

The square root of 20822393 is about 4563.1560350266. The cubic root of 20822393 is about 275.1124300613.

The spelling of 20822393 in words is "twenty million, eight hundred twenty-two thousand, three hundred ninety-three".