20013725121477 has 8 divisors (see below), whose sum is σ = 26688874451040. Its totient is φ = 13340529603120.

The previous prime is 20013725121353. The next prime is 20013725121529. The reversal of 20013725121477 is 77412152731002.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 20013725121477 - 2¹⁰ = 20013725120453 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20013725121077) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 488428899 + ... + 488469872.

It is an arithmetic number, because the mean of its divisors is an integer number (3336109306380).

Almost surely, 2^{20013725121477} is an apocalyptic number.

It is an amenable number.

20013725121477 is a deficient number, since it is larger than the sum of its proper divisors (6675149329563).

20013725121477 is an equidigital number, since it uses as much as digits as its factorization.

20013725121477 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 976905603.

The product of its (nonzero) digits is 164640, while the sum is 42.

Adding to 20013725121477 its reverse (77412152731002), we get a palindrome (97425877852479).

The spelling of 20013725121477 in words is "twenty trillion, thirteen billion, seven hundred twenty-five million, one hundred twenty-one thousand, four hundred seventy-seven".