20125464667505 has 32 divisors (see below), whose sum is σ = 25787550438144. Its totient is φ = 15041677787136.

The previous prime is 20125464667499. The next prime is 20125464667541. The reversal of 20125464667505 is 50576646452102.

It is a cyclic number.

It is not a de Polignac number, because 20125464667505 - 2⁴⁰ = 19025953039729 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 192689057 + ... + 192793473.

It is an arithmetic number, because the mean of its divisors is an integer number (805860951192).

Almost surely, 2^{20125464667505} is an apocalyptic number.

It is an amenable number.

20125464667505 is a deficient number, since it is larger than the sum of its proper divisors (5662085770639).

20125464667505 is a wasteful number, since it uses less digits than its factorization.

20125464667505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 143465.

The product of its (nonzero) digits is 12096000, while the sum is 53.

The spelling of 20125464667505 in words is "twenty trillion, one hundred twenty-five billion, four hundred sixty-four million, six hundred sixty-seven thousand, five hundred five".