20434123430105 has 48 divisors (see below), whose sum is σ = 32470427159424. Its totient is φ = 12184322008320.

The previous prime is 20434123430041. The next prime is 20434123430107. The reversal of 20434123430105 is 50103432143402.

It is not a de Polignac number, because 20434123430105 - 2⁶ = 20434123430041 is a prime.

It is a super-2 number, since 2×20434123430105² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20434123430107) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 164769212 + ... + 164893181.

It is an arithmetic number, because the mean of its divisors is an integer number (676467232488).

Almost surely, 2^{20434123430105} is an apocalyptic number.

It is an amenable number.

20434123430105 is a deficient number, since it is larger than the sum of its proper divisors (12036303729319).

20434123430105 is a wasteful number, since it uses less digits than its factorization.

20434123430105 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 329662446 (or 329662439 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 32.

Adding to 20434123430105 its reverse (50103432143402), we get a palindrome (70537555573507).

The spelling of 20434123430105 in words is "twenty trillion, four hundred thirty-four billion, one hundred twenty-three million, four hundred thirty thousand, one hundred five".