20422313 has 2 divisors, whose sum is σ = 20422314. Its totient is φ = 20422312.

The previous prime is 20422309. The next prime is 20422343. The reversal of 20422313 is 31322402.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 19642624 + 779689 = 4432^2 + 883^2 .

It is a cyclic number.

It is not a de Polignac number, because 20422313 - 2² = 20422309 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20422291 and 20422300.

It is not a weakly prime, because it can be changed into another prime (20422343) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10211156 + 10211157.

It is an arithmetic number, because the mean of its divisors is an integer number (10211157).

Almost surely, 2^20422313 is an apocalyptic number.

It is an amenable number.

20422313 is a deficient number, since it is larger than the sum of its proper divisors (1).

20422313 is an equidigital number, since it uses as much as digits as its factorization.

20422313 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 288, while the sum is 17.

The square root of 20422313 is about 4519.1053318107. The cubic root of 20422313 is about 273.3390260894.

Adding to 20422313 its reverse (31322402), we get a palindrome (51744715).

The spelling of 20422313 in words is "twenty million, four hundred twenty-two thousand, three hundred thirteen".