20122440405 has 32 divisors (see below), whose sum is σ = 34402579200. Its totient is φ = 10007995392.

The previous prime is 20122440391. The next prime is 20122440413. The reversal of 20122440405 is 50404422102.

It is a happy number.

It is not a de Polignac number, because 20122440405 - 2⁶ = 20122440341 is a prime.

It is a congruent number.

It is an unprimeable number.

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 in 31 ways as a sum of consecutive naturals, for example, 334185 + ... + 389774.

It is an arithmetic number, because the mean of its divisors is an integer number (1075080600).

Almost surely, 2^20122440405 is an apocalyptic number.

It is an amenable number.

20122440405 is a deficient number, since it is larger than the sum of its proper divisors (14280138795).

20122440405 is a wasteful number, since it uses less digits than its factorization.

20122440405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 724093.

The product of its (nonzero) digits is 2560, while the sum is 24.

Adding to 20122440405 its reverse (50404422102), we get a palindrome (70526862507).

The spelling of 20122440405 in words is "twenty billion, one hundred twenty-two million, four hundred forty thousand, four hundred five".