20924941 has 2 divisors, whose sum is σ = 20924942. Its totient is φ = 20924940.

The previous prime is 20924903. The next prime is 20924957. The reversal of 20924941 is 14942902.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 14402025 + 6522916 = 3795^2 + 2554^2 .

It is a cyclic number.

It is not a de Polignac number, because 20924941 - 2⁹ = 20924429 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20904941) 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, 10462470 + 10462471.

It is an arithmetic number, because the mean of its divisors is an integer number (10462471).

Almost surely, 2^20924941 is an apocalyptic number.

It is an amenable number.

20924941 is a deficient number, since it is larger than the sum of its proper divisors (1).

20924941 is an equidigital number, since it uses as much as digits as its factorization.

20924941 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5184, while the sum is 31.

The square root of 20924941 is about 4574.3787556345. The cubic root of 20924941 is about 275.5633235094.

The spelling of 20924941 in words is "twenty million, nine hundred twenty-four thousand, nine hundred forty-one".