20913941 has 2 divisors, whose sum is σ = 20913942. Its totient is φ = 20913940.

The previous prime is 20913931. The next prime is 20913967. The reversal of 20913941 is 14931902.

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., 18576100 + 2337841 = 4310^2 + 1529^2 .

It is a cyclic number.

It is not a de Polignac number, because 20913941 - 2¹⁰ = 20912917 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20913931) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10456970 + 10456971.

It is an arithmetic number, because the mean of its divisors is an integer number (10456971).

Almost surely, 2^20913941 is an apocalyptic number.

It is an amenable number.

20913941 is a deficient number, since it is larger than the sum of its proper divisors (1).

20913941 is an equidigital number, since it uses as much as digits as its factorization.

20913941 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1944, while the sum is 29.

The square root of 20913941 is about 4573.1762485170. The cubic root of 20913941 is about 275.5150282260.

The spelling of 20913941 in words is "twenty million, nine hundred thirteen thousand, nine hundred forty-one".