20455315120513 has 12 divisors (see below), whose sum is σ = 25314100877568. Its totient is φ = 16184425149360.

The previous prime is 20455315120511. The next prime is 20455315120547. The reversal of 20455315120513 is 31502151355402.

It is not a de Polignac number, because 20455315120513 - 2¹ = 20455315120511 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20455315120511) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 8645525073 + ... + 8645527438.

It is an arithmetic number, because the mean of its divisors is an integer number (2109508406464).

Almost surely, 2^{20455315120513} is an apocalyptic number.

It is an amenable number.

20455315120513 is a deficient number, since it is larger than the sum of its proper divisors (4858785757055).

20455315120513 is a wasteful number, since it uses less digits than its factorization.

20455315120513 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17291052544 (or 17291052531 counting only the distinct ones).

The product of its (nonzero) digits is 90000, while the sum is 37.

Adding to 20455315120513 its reverse (31502151355402), we get a palindrome (51957466475915).

The spelling of 20455315120513 in words is "twenty trillion, four hundred fifty-five billion, three hundred fifteen million, one hundred twenty thousand, five hundred thirteen".