20013653121544 has 64 divisors (see below), whose sum is σ = 39803403965760. Its totient is φ = 9401511383040.

The previous prime is 20013653121509. The next prime is 20013653121559. The reversal of 20013653121544 is 44512135631002.

It is a super-2 number, since 2×20013653121544² (a number of 27 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 203637664 + ... + 203735920.

It is an arithmetic number, because the mean of its divisors is an integer number (621928186965).

Almost surely, 2^{20013653121544} is an apocalyptic number.

It is an amenable number.

20013653121544 is a deficient number, since it is larger than the sum of its proper divisors (19789750844216).

20013653121544 is a wasteful number, since it uses less digits than its factorization.

20013653121544 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 100918 (or 100914 counting only the distinct ones).

The product of its (nonzero) digits is 86400, while the sum is 37.

Adding to 20013653121544 its reverse (44512135631002), we get a palindrome (64525788752546).

The spelling of 20013653121544 in words is "twenty trillion, thirteen billion, six hundred fifty-three million, one hundred twenty-one thousand, five hundred forty-four".