20345154555105 has 12 divisors (see below), whose sum is σ = 35264934562260. Its totient is φ = 10850749096032.

The previous prime is 20345154555083. The next prime is 20345154555119. The reversal of 20345154555105 is 50155545154302.

20345154555105 is a `hidden beast` number, since 2 + 0 + 3 + 4 + 51 + 5 + 45 + 551 + 0 + 5 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 8696742552576 + 11648412002529 = 2949024^2 + 3412977^2 .

It is not a de Polignac number, because 20345154555105 - 2⁸ = 20345154554849 is a prime.

It is a super-2 number, since 2×20345154555105² (a number of 27 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45), and also a Moran number because the ratio is a prime number: 452114545669 = 20345154555105 / (2 + 0 + 3 + 4 + 5 + 1 + 5 + 4 + 5 + 5 + 5 + 1 + 0 + 5).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 226057272790 + ... + 226057272879.

It is an arithmetic number, because the mean of its divisors is an integer number (2938744546855).

Almost surely, 2^{20345154555105} is an apocalyptic number.

It is an amenable number.

20345154555105 is a deficient number, since it is larger than the sum of its proper divisors (14919780007155).

20345154555105 is a wasteful number, since it uses less digits than its factorization.

20345154555105 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 452114545680 (or 452114545677 counting only the distinct ones).

The product of its (nonzero) digits is 1500000, while the sum is 45.

The spelling of 20345154555105 in words is "twenty trillion, three hundred forty-five billion, one hundred fifty-four million, five hundred fifty-five thousand, one hundred five".