20344221231 has 32 divisors (see below), whose sum is σ = 28900761600. Its totient is φ = 12710031840.

The previous prime is 20344221221. The next prime is 20344221301. The reversal of 20344221231 is 13212244302.

It is a happy number.

It is not a de Polignac number, because 20344221231 - 2¹⁰ = 20344220207 is a prime.

It is a super-2 number, since 2×20344221231² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20344221221) 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 31 ways as a sum of consecutive naturals, for example, 339960 + ... + 395298.

It is an arithmetic number, because the mean of its divisors is an integer number (903148800).

Almost surely, 2^20344221231 is an apocalyptic number.

20344221231 is a deficient number, since it is larger than the sum of its proper divisors (8556540369).

20344221231 is a wasteful number, since it uses less digits than its factorization.

20344221231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55499.

The product of its (nonzero) digits is 2304, while the sum is 24.

Adding to 20344221231 its reverse (13212244302), we get a palindrome (33556465533).

The spelling of 20344221231 in words is "twenty billion, three hundred forty-four million, two hundred twenty-one thousand, two hundred thirty-one".