20125464411553 has 4 divisors (see below), whose sum is σ = 20127065622660. Its totient is φ = 20123863200448.

The previous prime is 20125464411517. The next prime is 20125464411581. The reversal of 20125464411553 is 35511446452102.

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

It can be written as a sum of positive squares in 2 ways, for example, as 16325058423184 + 3800405988369 = 4040428^2 + 1949463^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20125464411553 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20125464411853) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 800586700 + ... + 800611837.

It is an arithmetic number, because the mean of its divisors is an integer number (5031766405665).

Almost surely, 2^{20125464411553} is an apocalyptic number.

It is an amenable number.

20125464411553 is a deficient number, since it is larger than the sum of its proper divisors (1601211107).

20125464411553 is a wasteful number, since it uses less digits than its factorization.

20125464411553 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1601211106.

The product of its (nonzero) digits is 576000, while the sum is 43.

The spelling of 20125464411553 in words is "twenty trillion, one hundred twenty-five billion, four hundred sixty-four million, four hundred eleven thousand, five hundred fifty-three".