20340221243 has 8 divisors (see below), whose sum is σ = 20824420848. Its totient is φ = 19856529504.

The previous prime is 20340221203. The next prime is 20340221263. The reversal of 20340221243 is 34212204302.

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

It is a cyclic number.

It is not a de Polignac number, because 20340221243 - 2¹⁶ = 20340155707 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20340221203) 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, 45296 + ... + 206717.

It is an arithmetic number, because the mean of its divisors is an integer number (2603052606).

Almost surely, 2^20340221243 is an apocalyptic number.

20340221243 is a deficient number, since it is larger than the sum of its proper divisors (484199605).

20340221243 is a wasteful number, since it uses less digits than its factorization.

20340221243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 253933.

The product of its (nonzero) digits is 2304, while the sum is 23.

Adding to 20340221243 its reverse (34212204302), we get a palindrome (54552425545).

The spelling of 20340221243 in words is "twenty billion, three hundred forty million, two hundred twenty-one thousand, two hundred forty-three".