20466461 has 2 divisors, whose sum is σ = 20466462. Its totient is φ = 20466460.

The previous prime is 20466437. The next prime is 20466463. The reversal of 20466461 is 16466402.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 16760836 + 3705625 = 4094^2 + 1925^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20466461 is a prime.

Together with 20466463, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20466463) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10233230 + 10233231.

It is an arithmetic number, because the mean of its divisors is an integer number (10233231).

Almost surely, 2^20466461 is an apocalyptic number.

It is an amenable number.

20466461 is a deficient number, since it is larger than the sum of its proper divisors (1).

20466461 is an equidigital number, since it uses as much as digits as its factorization.

20466461 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6912, while the sum is 29.

The square root of 20466461 is about 4523.9872899910. The cubic root of 20466461 is about 273.5358481665.

The spelling of 20466461 in words is "twenty million, four hundred sixty-six thousand, four hundred sixty-one".