20013172623472 has 160 divisors (see below), whose sum is σ = 44869988136960. Its totient is φ = 8470466784000.

The previous prime is 20013172623413. The next prime is 20013172623557. The reversal of 20013172623472 is 27432627131002.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2029934479 + ... + 2029944337.

It is an arithmetic number, because the mean of its divisors is an integer number (280437425856).

Almost surely, 2^{20013172623472} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20013172623472, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22434994068480).

20013172623472 is an abundant number, since it is smaller than the sum of its proper divisors (24856815513488).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20013172623472 is a wasteful number, since it uses less digits than its factorization.

20013172623472 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10731 (or 10725 counting only the distinct ones).

The product of its (nonzero) digits is 169344, while the sum is 40.

Adding to 20013172623472 its reverse (27432627131002), we get a palindrome (47445799754474).

The spelling of 20013172623472 in words is "twenty trillion, thirteen billion, one hundred seventy-two million, six hundred twenty-three thousand, four hundred seventy-two".