20001837272849 has 2 divisors, whose sum is σ = 20001837272850. Its totient is φ = 20001837272848.

The previous prime is 20001837272827. The next prime is 20001837272891. The reversal of 20001837272849 is 94827273810002.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 14825156619025 + 5176680653824 = 3850345^2 + 2275232^2 .

It is a cyclic number.

It is not a de Polignac number, because 20001837272849 - 2⁴⁴ = 2409651228433 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20001837272849.

It is not a weakly prime, because it can be changed into another prime (20001837271849) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10000918636424 + 10000918636425.

It is an arithmetic number, because the mean of its divisors is an integer number (10000918636425).

Almost surely, 2^{20001837272849} is an apocalyptic number.

It is an amenable number.

20001837272849 is a deficient number, since it is larger than the sum of its proper divisors (1).

20001837272849 is an equidigital number, since it uses as much as digits as its factorization.

20001837272849 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2709504, while the sum is 53.

The spelling of 20001837272849 in words is "twenty trillion, one billion, eight hundred thirty-seven million, two hundred seventy-two thousand, eight hundred forty-nine".