20400410417 has 2 divisors, whose sum is σ = 20400410418. Its totient is φ = 20400410416.

The previous prime is 20400410369. The next prime is 20400410449. The reversal of 20400410417 is 71401400402.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 16107671056 + 4292739361 = 126916^2 + 65519^2 .

It is a cyclic number.

It is not a de Polignac number, because 20400410417 - 2⁸ = 20400410161 is a prime.

It is a super-2 number, since 2×20400410417² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 20400410392 and 20400410401.

It is not a weakly prime, because it can be changed into another prime (20400416417) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10200205208 + 10200205209.

It is an arithmetic number, because the mean of its divisors is an integer number (10200205209).

Almost surely, 2^20400410417 is an apocalyptic number.

It is an amenable number.

20400410417 is a deficient number, since it is larger than the sum of its proper divisors (1).

20400410417 is an equidigital number, since it uses as much as digits as its factorization.

20400410417 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 896, while the sum is 23.

Adding to 20400410417 its reverse (71401400402), we get a palindrome (91801810819).

The spelling of 20400410417 in words is "twenty billion, four hundred million, four hundred ten thousand, four hundred seventeen".