20143210217 has 24 divisors (see below), whose sum is σ = 22076682264. Its totient is φ = 18368722944.

The previous prime is 20143210123. The next prime is 20143210247. The reversal of 20143210217 is 71201234102.

It can be written as a sum of positive squares in 12 ways, for example, as 19940546521 + 202663696 = 141211^2 + 14236^2 .

It is not a de Polignac number, because 20143210217 - 2¹² = 20143206121 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20143210192 and 20143210201.

It is not an unprimeable number, because it can be changed into a prime (20143210247) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 16605503 + ... + 16606715.

It is an arithmetic number, because the mean of its divisors is an integer number (919861761).

Almost surely, 2^20143210217 is an apocalyptic number.

It is an amenable number.

20143210217 is a deficient number, since it is larger than the sum of its proper divisors (1933472047).

20143210217 is a wasteful number, since it uses less digits than its factorization.

20143210217 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2349 (or 2336 counting only the distinct ones).

The product of its (nonzero) digits is 672, while the sum is 23.

Adding to 20143210217 its reverse (71201234102), we get a palindrome (91344444319).

The spelling of 20143210217 in words is "twenty billion, one hundred forty-three million, two hundred ten thousand, two hundred seventeen".