20013244321 has 4 divisors (see below), whose sum is σ = 22872279232. Its totient is φ = 17154209412.

The previous prime is 20013244319. The next prime is 20013244397. The reversal of 20013244321 is 12344231002.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 20013244321 - 2¹ = 20013244319 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20013244292 and 20013244301.

It is not an unprimeable number, because it can be changed into a prime (20013244301) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1429517445 + ... + 1429517458.

It is an arithmetic number, because the mean of its divisors is an integer number (5718069808).

Almost surely, 2^20013244321 is an apocalyptic number.

It is an amenable number.

20013244321 is a deficient number, since it is larger than the sum of its proper divisors (2859034911).

20013244321 is an equidigital number, since it uses as much as digits as its factorization.

20013244321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2859034910.

The product of its (nonzero) digits is 1152, while the sum is 22.

Adding to 20013244321 its reverse (12344231002), we get a palindrome (32357475323).

The spelling of 20013244321 in words is "twenty billion, thirteen million, two hundred forty-four thousand, three hundred twenty-one".