20105422439 has 4 divisors (see below), whose sum is σ = 20105719656. Its totient is φ = 20105125224.

The previous prime is 20105422391. The next prime is 20105422459. The reversal of 20105422439 is 93422450102.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 20105422439 - 2¹⁶ = 20105356903 is a prime.

It is a super-2 number, since 2×20105422439² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20105422459) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 7577 + ... + 200669.

It is an arithmetic number, because the mean of its divisors is an integer number (5026429914).

Almost surely, 2^20105422439 is an apocalyptic number.

20105422439 is a deficient number, since it is larger than the sum of its proper divisors (297217).

20105422439 is a wasteful number, since it uses less digits than its factorization.

20105422439 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 297216.

The product of its (nonzero) digits is 17280, while the sum is 32.

The spelling of 20105422439 in words is "twenty billion, one hundred five million, four hundred twenty-two thousand, four hundred thirty-nine".