20914609 has 2 divisors, whose sum is σ = 20914610. Its totient is φ = 20914608.

The previous prime is 20914603. The next prime is 20914627. The reversal of 20914609 is 90641902.

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., 12271009 + 8643600 = 3503^2 + 2940^2 .

It is a cyclic number.

It is not a de Polignac number, because 20914609 - 2¹¹ = 20912561 is a prime.

It is not a weakly prime, because it can be changed into another prime (20914603) 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, 10457304 + 10457305.

It is an arithmetic number, because the mean of its divisors is an integer number (10457305).

Almost surely, 2^20914609 is an apocalyptic number.

It is an amenable number.

20914609 is a deficient number, since it is larger than the sum of its proper divisors (1).

20914609 is an equidigital number, since it uses as much as digits as its factorization.

20914609 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3888, while the sum is 31.

The square root of 20914609 is about 4573.2492825124. The cubic root of 20914609 is about 275.5179615498.

The spelling of 20914609 in words is "twenty million, nine hundred fourteen thousand, six hundred nine".