20445224407 has 2 divisors, whose sum is σ = 20445224408. Its totient is φ = 20445224406.

The previous prime is 20445224399. The next prime is 20445224453. The reversal of 20445224407 is 70442254402.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20445224407 - 2³ = 20445224399 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20445224477) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10222612203 + 10222612204.

It is an arithmetic number, because the mean of its divisors is an integer number (10222612204).

Almost surely, 2^20445224407 is an apocalyptic number.

20445224407 is a deficient number, since it is larger than the sum of its proper divisors (1).

20445224407 is an equidigital number, since it uses as much as digits as its factorization.

20445224407 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 71680, while the sum is 34.

Adding to 20445224407 its reverse (70442254402), we get a palindrome (90887478809).

The spelling of 20445224407 in words is "twenty billion, four hundred forty-five million, two hundred twenty-four thousand, four hundred seven".