20879941 has 2 divisors, whose sum is σ = 20879942. Its totient is φ = 20879940.

The previous prime is 20879921. The next prime is 20879953. The reversal of 20879941 is 14997802.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 19766916 + 1113025 = 4446^2 + 1055^2 .

It is a cyclic number.

It is not a de Polignac number, because 20879941 - 2⁵ = 20879909 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20879894 and 20879903.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20879921) 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, 10439970 + 10439971.

It is an arithmetic number, because the mean of its divisors is an integer number (10439971).

Almost surely, 2^20879941 is an apocalyptic number.

It is an amenable number.

20879941 is a deficient number, since it is larger than the sum of its proper divisors (1).

20879941 is an equidigital number, since it uses as much as digits as its factorization.

20879941 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 36288, while the sum is 40.

The square root of 20879941 is about 4569.4574076142. The cubic root of 20879941 is about 275.3656447464.

The spelling of 20879941 in words is "twenty million, eight hundred seventy-nine thousand, nine hundred forty-one".