20409041 has 2 divisors, whose sum is σ = 20409042. Its totient is φ = 20409040.

The previous prime is 20409019. The next prime is 20409079. The reversal of 20409041 is 14090402.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 13140625 + 7268416 = 3625^2 + 2696^2 .

It is a cyclic number.

It is not a de Polignac number, because 20409041 - 2¹⁴ = 20392657 is a prime.

It is not a weakly prime, because it can be changed into another prime (20409001) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10204520 + 10204521.

It is an arithmetic number, because the mean of its divisors is an integer number (10204521).

Almost surely, 2^20409041 is an apocalyptic number.

It is an amenable number.

20409041 is a deficient number, since it is larger than the sum of its proper divisors (1).

20409041 is an equidigital number, since it uses as much as digits as its factorization.

20409041 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 288, while the sum is 20.

The square root of 20409041 is about 4517.6366609102. The cubic root of 20409041 is about 273.2798009712.

Adding to 20409041 its reverse (14090402), we get a palindrome (34499443).

The spelling of 20409041 in words is "twenty million, four hundred nine thousand, forty-one".