20125461026405 has 16 divisors (see below), whose sum is σ = 27989373567744. Its totient is φ = 13605945480960.

The previous prime is 20125461026381. The next prime is 20125461026449. The reversal of 20125461026405 is 50462016452102.

It is not a de Polignac number, because 20125461026405 - 2²⁸ = 20125192590949 is a prime.

It is a super-2 number, since 2×20125461026405² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4049386052 + ... + 4049391021.

It is an arithmetic number, because the mean of its divisors is an integer number (1749335847984).

Almost surely, 2^{20125461026405} is an apocalyptic number.

It is an amenable number.

20125461026405 is a deficient number, since it is larger than the sum of its proper divisors (7863912541339).

20125461026405 is an equidigital number, since it uses as much as digits as its factorization.

20125461026405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8098777156.

The product of its (nonzero) digits is 115200, while the sum is 38.

Adding to 20125461026405 its reverse (50462016452102), we get a palindrome (70587477478507).

The spelling of 20125461026405 in words is "twenty trillion, one hundred twenty-five billion, four hundred sixty-one million, twenty-six thousand, four hundred five".