20345004406105 has 16 divisors (see below), whose sum is σ = 26116619371920. Its totient is φ = 15160667922432.

The previous prime is 20345004406087. The next prime is 20345004406109. The reversal of 20345004406105 is 50160440054302.

It can be written as a sum of positive squares in 8 ways, for example, as 1765042445401 + 18579961960704 = 1328549^2 + 4310448^2 .

It is a cyclic number.

It is not a de Polignac number, because 20345004406105 - 2¹⁷ = 20345004275033 is a prime.

It is a super-2 number, since 2×20345004406105² (a number of 27 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (20345004406109) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 1233770070 + ... + 1233786559.

It is an arithmetic number, because the mean of its divisors is an integer number (1632288710745).

Almost surely, 2^{20345004406105} is an apocalyptic number.

It is an amenable number.

20345004406105 is a deficient number, since it is larger than the sum of its proper divisors (5771614965815).

20345004406105 is a wasteful number, since it uses less digits than its factorization.

20345004406105 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2467556748.

The product of its (nonzero) digits is 57600, while the sum is 34.

The spelling of 20345004406105 in words is "twenty trillion, three hundred forty-five billion, four million, four hundred six thousand, one hundred five".