20001210239 has 2 divisors, whose sum is σ = 20001210240. Its totient is φ = 20001210238.

The previous prime is 20001210191. The next prime is 20001210241. The reversal of 20001210239 is 93201210002.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20001210239 - 2²⁴ = 19984433023 is a prime.

It is a super-2 number, since 2×20001210239² (a number of 21 digits) contains 22 as substring.

Together with 20001210241, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20001210239.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20001216239) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10000605119 + 10000605120.

It is an arithmetic number, because the mean of its divisors is an integer number (10000605120).

Almost surely, 2^20001210239 is an apocalyptic number.

20001210239 is a deficient number, since it is larger than the sum of its proper divisors (1).

20001210239 is an equidigital number, since it uses as much as digits as its factorization.

20001210239 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 216, while the sum is 20.

The spelling of 20001210239 in words is "twenty billion, one million, two hundred ten thousand, two hundred thirty-nine".