20130161856832 has 14 divisors (see below), whose sum is σ = 39945789934778. Its totient is φ = 10065080928384.

The previous prime is 20130161856751. The next prime is 20130161856853. The reversal of 20130161856832 is 23865816103102.

It can be written as a sum of positive squares in only one way, i.e., 10297321595136 + 9832840261696 = 3208944^2 + 3135736^2 .

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 as a sum of consecutive naturals, namely, 157266889443 + ... + 157266889570.

It is an arithmetic number, because the mean of its divisors is an integer number (2853270709627).

Almost surely, 2^{20130161856832} is an apocalyptic number.

It is an amenable number.

20130161856832 is a deficient number, since it is larger than the sum of its proper divisors (19815628077946).

20130161856832 is an equidigital number, since it uses as much as digits as its factorization.

20130161856832 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 314533779025 (or 314533779015 counting only the distinct ones).

The product of its (nonzero) digits is 414720, while the sum is 46.

Adding to 20130161856832 its reverse (23865816103102), we get a palindrome (43995977959934).

The spelling of 20130161856832 in words is "twenty trillion, one hundred thirty billion, one hundred sixty-one million, eight hundred fifty-six thousand, eight hundred thirty-two".