20994234841 has 2 divisors, whose sum is σ = 20994234842. Its totient is φ = 20994234840.

The previous prime is 20994234829. The next prime is 20994234853. The reversal of 20994234841 is 14843249902.

It is a balanced prime because it is at equal distance from previous prime (20994234829) and next prime (20994234853).

It can be written as a sum of positive squares in only one way, i.e., 19992828816 + 1001406025 = 141396^2 + 31645^2 .

It is a cyclic number.

It is not a de Polignac number, because 20994234841 - 2¹⁷ = 20994103769 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20994234791 and 20994234800.

It is not a weakly prime, because it can be changed into another prime (20994234241) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10497117420 + 10497117421.

It is an arithmetic number, because the mean of its divisors is an integer number (10497117421).

Almost surely, 2^20994234841 is an apocalyptic number.

It is an amenable number.

20994234841 is a deficient number, since it is larger than the sum of its proper divisors (1).

20994234841 is an equidigital number, since it uses as much as digits as its factorization.

20994234841 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 497664, while the sum is 46.

The spelling of 20994234841 in words is "twenty billion, nine hundred ninety-four million, two hundred thirty-four thousand, eight hundred forty-one".