20005112015755 has 4 divisors (see below), whose sum is σ = 24006134418912. Its totient is φ = 16004089612600.

The previous prime is 20005112015683. The next prime is 20005112015783. The reversal of 20005112015755 is 55751021150002.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 20005112015755 - 2⁹ = 20005112015243 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20005112015755.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2000511201571 + ... + 2000511201580.

It is an arithmetic number, because the mean of its divisors is an integer number (6001533604728).

Almost surely, 2^{20005112015755} is an apocalyptic number.

20005112015755 is a deficient number, since it is larger than the sum of its proper divisors (4001022403157).

20005112015755 is an equidigital number, since it uses as much as digits as its factorization.

20005112015755 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4001022403156.

The product of its (nonzero) digits is 17500, while the sum is 34.

Adding to 20005112015755 its reverse (55751021150002), we get a palindrome (75756133165757).

The spelling of 20005112015755 in words is "twenty trillion, five billion, one hundred twelve million, fifteen thousand, seven hundred fifty-five".