20126256127019 has 16 divisors (see below), whose sum is σ = 23042882304000. Its totient is φ = 17220002013504.

The previous prime is 20126256127007. The next prime is 20126256127099. The reversal of 20126256127019 is 91072165262102.

It is a cyclic number.

It is not a de Polignac number, because 20126256127019 - 2²⁰ = 20126255078443 is a prime.

It is a super-2 number, since 2×20126256127019² (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 (20126256127099) 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, 22999007 + ... + 23858055.

It is an arithmetic number, because the mean of its divisors is an integer number (1440180144000).

Almost surely, 2^{20126256127019} is an apocalyptic number.

20126256127019 is a deficient number, since it is larger than the sum of its proper divisors (2916626176981).

20126256127019 is an equidigital number, since it uses as much as digits as its factorization.

20126256127019 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 865082.

The product of its (nonzero) digits is 181440, while the sum is 44.

The spelling of 20126256127019 in words is "twenty trillion, one hundred twenty-six billion, two hundred fifty-six million, one hundred twenty-seven thousand, nineteen".