20021225417 has 2 divisors, whose sum is σ = 20021225418. Its totient is φ = 20021225416.

The previous prime is 20021225383. The next prime is 20021225423. The reversal of 20021225417 is 71452212002.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 20011214521 + 10010896 = 141461^2 + 3164^2 .

It is a cyclic number.

It is not a de Polignac number, because 20021225417 - 2¹⁶ = 20021159881 is a prime.

It is not a weakly prime, because it can be changed into another prime (20021225467) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10010612708 + 10010612709.

It is an arithmetic number, because the mean of its divisors is an integer number (10010612709).

Almost surely, 2^20021225417 is an apocalyptic number.

It is an amenable number.

20021225417 is a deficient number, since it is larger than the sum of its proper divisors (1).

20021225417 is an equidigital number, since it uses as much as digits as its factorization.

20021225417 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2240, while the sum is 26.

Adding to 20021225417 its reverse (71452212002), we get a palindrome (91473437419).

The spelling of 20021225417 in words is "twenty billion, twenty-one million, two hundred twenty-five thousand, four hundred seventeen".