20404337 has 2 divisors, whose sum is σ = 20404338. Its totient is φ = 20404336.

The previous prime is 20404331. The next prime is 20404343. The reversal of 20404337 is 73340402.

It is a happy number.

It is a balanced prime because it is at equal distance from previous prime (20404331) and next prime (20404343).

It can be written as a sum of positive squares in only one way, i.e., 19324816 + 1079521 = 4396^2 + 1039^2 .

It is a cyclic number.

It is not a de Polignac number, because 20404337 - 2¹⁴ = 20387953 is a prime.

It is not a weakly prime, because it can be changed into another prime (20404331) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10202168 + 10202169.

It is an arithmetic number, because the mean of its divisors is an integer number (10202169).

Almost surely, 2^20404337 is an apocalyptic number.

It is an amenable number.

20404337 is a deficient number, since it is larger than the sum of its proper divisors (1).

20404337 is an equidigital number, since it uses as much as digits as its factorization.

20404337 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2016, while the sum is 23.

The square root of 20404337 is about 4517.1160047092. The cubic root of 20404337 is about 273.2588036272.

Adding to 20404337 its reverse (73340402), we get a palindrome (93744739).

The spelling of 20404337 in words is "twenty million, four hundred four thousand, three hundred thirty-seven".