20844227401 has 2 divisors, whose sum is σ = 20844227402. Its totient is φ = 20844227400.

The previous prime is 20844227363. The next prime is 20844227413. The reversal of 20844227401 is 10472244802.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 15345263376 + 5498964025 = 123876^2 + 74155^2 .

It is a cyclic number.

It is not a de Polignac number, because 20844227401 - 2²⁷ = 20710009673 is a prime.

It is not a weakly prime, because it can be changed into another prime (20844227461) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10422113700 + 10422113701.

It is an arithmetic number, because the mean of its divisors is an integer number (10422113701).

Almost surely, 2^20844227401 is an apocalyptic number.

It is an amenable number.

20844227401 is a deficient number, since it is larger than the sum of its proper divisors (1).

20844227401 is an equidigital number, since it uses as much as digits as its factorization.

20844227401 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 28672, while the sum is 34.

The spelling of 20844227401 in words is "twenty billion, eight hundred forty-four million, two hundred twenty-seven thousand, four hundred one".