20126256105513 has 16 divisors (see below), whose sum is σ = 26992265878080. Its totient is φ = 13338915988416.

The previous prime is 20126256105511. The next prime is 20126256105589. The reversal of 20126256105513 is 31550165262102.

It is not a de Polignac number, because 20126256105513 - 2¹ = 20126256105511 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20126256105511) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3121870 + ... + 7070967.

It is an arithmetic number, because the mean of its divisors is an integer number (1687016617380).

Almost surely, 2^{20126256105513} is an apocalyptic number.

It is an amenable number.

20126256105513 is a deficient number, since it is larger than the sum of its proper divisors (6866009772567).

20126256105513 is a wasteful number, since it uses less digits than its factorization.

20126256105513 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10196696.

The product of its (nonzero) digits is 108000, while the sum is 39.

The spelling of 20126256105513 in words is "twenty trillion, one hundred twenty-six billion, two hundred fifty-six million, one hundred five thousand, five hundred thirteen".