20442434111405 has 8 divisors (see below), whose sum is σ = 24531234533784. Its totient is φ = 16353738222400.

The previous prime is 20442434111389. The next prime is 20442434111431. The reversal of 20442434111405 is 50411143424402.

It can be written as a sum of positive squares in 4 ways, for example, as 4662615357481 + 15779818753924 = 2159309^2 + 3972382^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 20442434111405 - 2⁴ = 20442434111389 is a prime.

It is a super-2 number, since 2×20442434111405² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

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 in 7 ways as a sum of consecutive naturals, for example, 25702466 + ... + 26485875.

It is an arithmetic number, because the mean of its divisors is an integer number (3066404316723).

Almost surely, 2^{20442434111405} is an apocalyptic number.

It is an amenable number.

20442434111405 is a deficient number, since it is larger than the sum of its proper divisors (4088800422379).

20442434111405 is an equidigital number, since it uses as much as digits as its factorization.

20442434111405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52266687.

The product of its (nonzero) digits is 61440, while the sum is 35.

Adding to 20442434111405 its reverse (50411143424402), we get a palindrome (70853577535807).

The spelling of 20442434111405 in words is "twenty trillion, four hundred forty-two billion, four hundred thirty-four million, one hundred eleven thousand, four hundred five".