20908141 has 2 divisors, whose sum is σ = 20908142. Its totient is φ = 20908140.

The previous prime is 20908133. The next prime is 20908157. The reversal of 20908141 is 14180902.

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., 16434916 + 4473225 = 4054^2 + 2115^2 .

It is a cyclic number.

It is not a de Polignac number, because 20908141 - 2³ = 20908133 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20908171) 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, 10454070 + 10454071.

It is an arithmetic number, because the mean of its divisors is an integer number (10454071).

Almost surely, 2^20908141 is an apocalyptic number.

It is an amenable number.

20908141 is a deficient number, since it is larger than the sum of its proper divisors (1).

20908141 is an equidigital number, since it uses as much as digits as its factorization.

20908141 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 576, while the sum is 25.

The square root of 20908141 is about 4572.5420719770. The cubic root of 20908141 is about 275.4895566214.

The spelling of 20908141 in words is "twenty million, nine hundred eight thousand, one hundred forty-one".