20910941 has 2 divisors, whose sum is σ = 20910942. Its totient is φ = 20910940.

The previous prime is 20910919. The next prime is 20910961. The reversal of 20910941 is 14901902.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 20894041 + 16900 = 4571^2 + 130^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20910941 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20910941.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20910961) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10455470 + 10455471.

It is an arithmetic number, because the mean of its divisors is an integer number (10455471).

Almost surely, 2^20910941 is an apocalyptic number.

It is an amenable number.

20910941 is a deficient number, since it is larger than the sum of its proper divisors (1).

20910941 is an equidigital number, since it uses as much as digits as its factorization.

20910941 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 648, while the sum is 26.

The square root of 20910941 is about 4572.8482371494. The cubic root of 20910941 is about 275.5018538462.

The spelling of 20910941 in words is "twenty million, nine hundred ten thousand, nine hundred forty-one".