20163211243 has 6 divisors (see below), whose sum is σ = 23455164156. Its totient is φ = 17282752452.

The previous prime is 20163211223. The next prime is 20163211247. The reversal of 20163211243 is 34211236102.

It is not a de Polignac number, because 20163211243 - 2³³ = 11573276651 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20163211247) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 205747005 + ... + 205747102.

It is an arithmetic number, because the mean of its divisors is an integer number (3909194026).

Almost surely, 2^20163211243 is an apocalyptic number.

20163211243 is a deficient number, since it is larger than the sum of its proper divisors (3291952913).

20163211243 is an equidigital number, since it uses as much as digits as its factorization.

20163211243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 411494121 (or 411494114 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 25.

Adding to 20163211243 its reverse (34211236102), we get a palindrome (54374447345).

The spelling of 20163211243 in words is "twenty billion, one hundred sixty-three million, two hundred eleven thousand, two hundred forty-three".