20422613 has 2 divisors, whose sum is σ = 20422614. Its totient is φ = 20422612.

The previous prime is 20422609. The next prime is 20422637. The reversal of 20422613 is 31622402.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 20133169 + 289444 = 4487^2 + 538^2 .

It is a cyclic number.

It is not a de Polignac number, because 20422613 - 2² = 20422609 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20422693) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10211306 + 10211307.

It is an arithmetic number, because the mean of its divisors is an integer number (10211307).

Almost surely, 2^20422613 is an apocalyptic number.

It is an amenable number.

20422613 is a deficient number, since it is larger than the sum of its proper divisors (1).

20422613 is an equidigital number, since it uses as much as digits as its factorization.

20422613 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 576, while the sum is 20.

The square root of 20422613 is about 4519.1385240995. The cubic root of 20422613 is about 273.3403645161.

The spelling of 20422613 in words is "twenty million, four hundred twenty-two thousand, six hundred thirteen".