20016461 has 2 divisors, whose sum is σ = 20016462. Its totient is φ = 20016460.

The previous prime is 20016439. The next prime is 20016499. The reversal of 20016461 is 16461002.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 11519236 + 8497225 = 3394^2 + 2915^2 .

It is a cyclic number.

It is not a de Polignac number, because 20016461 - 2⁶ = 20016397 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20016431) 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, 10008230 + 10008231.

It is an arithmetic number, because the mean of its divisors is an integer number (10008231).

Almost surely, 2^20016461 is an apocalyptic number.

It is an amenable number.

20016461 is a deficient number, since it is larger than the sum of its proper divisors (1).

20016461 is an equidigital number, since it uses as much as digits as its factorization.

20016461 is an odious number, because the sum of its binary digits is odd.

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

The square root of 20016461 is about 4473.9759722198. The cubic root of 20016461 is about 271.5162112853.

Adding to 20016461 its reverse (16461002), we get a palindrome (36477463).

It can be divided in two parts, 200 and 16461, that added together give a palindrome (16661).

The spelling of 20016461 in words is "twenty million, sixteen thousand, four hundred sixty-one".