20344353221 has 8 divisors (see below), whose sum is σ = 20656145664. Its totient is φ = 20032800480.

The previous prime is 20344353181. The next prime is 20344353233. The reversal of 20344353221 is 12235344302.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20344353221 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20344353521) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 115001 + ... + 232193.

It is an arithmetic number, because the mean of its divisors is an integer number (2582018208).

Almost surely, 2^20344353221 is an apocalyptic number.

It is an amenable number.

20344353221 is a deficient number, since it is larger than the sum of its proper divisors (311792443).

20344353221 is a wasteful number, since it uses less digits than its factorization.

20344353221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 119851.

The product of its (nonzero) digits is 17280, while the sum is 29.

Adding to 20344353221 its reverse (12235344302), we get a palindrome (32579697523).

The spelling of 20344353221 in words is "twenty billion, three hundred forty-four million, three hundred fifty-three thousand, two hundred twenty-one".