20013121593 has 12 divisors (see below), whose sum is σ = 28995181488. Its totient is φ = 13301770680.

The previous prime is 20013121567. The next prime is 20013121637. The reversal of 20013121593 is 39512131002.

20013121593 is a `hidden beast` number, since 20 + 0 + 1 + 31 + 21 + 593 = 666.

It is not a de Polignac number, because 20013121593 - 2⁵ = 20013121561 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20013121543) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3356055 + ... + 3362012.

It is an arithmetic number, because the mean of its divisors is an integer number (2416265124).

Almost surely, 2^20013121593 is an apocalyptic number.

It is an amenable number.

20013121593 is a deficient number, since it is larger than the sum of its proper divisors (8982059895).

20013121593 is a wasteful number, since it uses less digits than its factorization.

20013121593 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6718404 (or 6718401 counting only the distinct ones).

The product of its (nonzero) digits is 1620, while the sum is 27.

Adding to 20013121593 its reverse (39512131002), we get a palindrome (59525252595).

The spelling of 20013121593 in words is "twenty billion, thirteen million, one hundred twenty-one thousand, five hundred ninety-three".