20790461 has 2 divisors, whose sum is σ = 20790462. Its totient is φ = 20790460.

The previous prime is 20790443. The next prime is 20790467. The reversal of 20790461 is 16409702.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 20748025 + 42436 = 4555^2 + 206^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20790461 is a prime.

It is a Chen prime.

It is equal to p_1317557 and since 20790461 and 1317557 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20790467) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10395230 + 10395231.

It is an arithmetic number, because the mean of its divisors is an integer number (10395231).

Almost surely, 2^20790461 is an apocalyptic number.

It is an amenable number.

20790461 is a deficient number, since it is larger than the sum of its proper divisors (1).

20790461 is an equidigital number, since it uses as much as digits as its factorization.

20790461 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3024, while the sum is 29.

The square root of 20790461 is about 4559.6557984129. The cubic root of 20790461 is about 274.9717260187.

The spelling of 20790461 in words is "twenty million, seven hundred ninety thousand, four hundred sixty-one".