20013244231 has 4 divisors (see below), whose sum is σ = 20341330264. Its totient is φ = 19685158200.

The previous prime is 20013244159. The next prime is 20013244283. The reversal of 20013244231 is 13244231002.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 13244231002 = 2 ⋅6622115501.

It is a cyclic number.

It is not a de Polignac number, because 20013244231 - 2¹³ = 20013236039 is a prime.

It is a super-2 number, since 2×20013244231² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20013244931) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 164042925 + ... + 164043046.

It is an arithmetic number, because the mean of its divisors is an integer number (5085332566).

Almost surely, 2^20013244231 is an apocalyptic number.

20013244231 is a deficient number, since it is larger than the sum of its proper divisors (328086033).

20013244231 is an equidigital number, since it uses as much as digits as its factorization.

20013244231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 328086032.

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

Adding to 20013244231 its reverse (13244231002), we get a palindrome (33257475233).

The spelling of 20013244231 in words is "twenty billion, thirteen million, two hundred forty-four thousand, two hundred thirty-one".