20013172623513 has 12 divisors (see below), whose sum is σ = 29522978055168. Its totient is φ = 13058240293080.

The previous prime is 20013172623413. The next prime is 20013172623557. The reversal of 20013172623513 is 31532627131002.

20013172623513 is a `hidden beast` number, since 2 + 0 + 0 + 1 + 3 + 17 + 2 + 623 + 5 + 13 = 666.

It is not a de Polignac number, because 20013172623513 - 2²⁴ = 20013155846297 is a prime.

It is a super-2 number, since 2×20013172623513² (a number of 27 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (20013172623583) 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, 23656231993 + ... + 23656232838.

It is an arithmetic number, because the mean of its divisors is an integer number (2460248171264).

Almost surely, 2^{20013172623513} is an apocalyptic number.

It is an amenable number.

20013172623513 is a deficient number, since it is larger than the sum of its proper divisors (9509805431655).

20013172623513 is a wasteful number, since it uses less digits than its factorization.

20013172623513 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47312464884 (or 47312464881 counting only the distinct ones).

The product of its (nonzero) digits is 45360, while the sum is 36.

Adding to 20013172623513 its reverse (31532627131002), we get a palindrome (51545799754515).

The spelling of 20013172623513 in words is "twenty trillion, thirteen billion, one hundred seventy-two million, six hundred twenty-three thousand, five hundred thirteen".