20290479841 has 2 divisors, whose sum is σ = 20290479842. Its totient is φ = 20290479840.

The previous prime is 20290479827. The next prime is 20290479883. The reversal of 20290479841 is 14897409202.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 14946285025 + 5344194816 = 122255^2 + 73104^2 .

It is a cyclic number.

It is not a de Polignac number, because 20290479841 - 2²³ = 20282091233 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20290479791 and 20290479800.

It is not a weakly prime, because it can be changed into another prime (20290479821) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10145239920 + 10145239921.

It is an arithmetic number, because the mean of its divisors is an integer number (10145239921).

Almost surely, 2^20290479841 is an apocalyptic number.

It is an amenable number.

20290479841 is a deficient number, since it is larger than the sum of its proper divisors (1).

20290479841 is an equidigital number, since it uses as much as digits as its factorization.

20290479841 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 290304, while the sum is 46.

The spelling of 20290479841 in words is "twenty billion, two hundred ninety million, four hundred seventy-nine thousand, eight hundred forty-one".