20264609 has 2 divisors, whose sum is σ = 20264610. Its totient is φ = 20264608.

The previous prime is 20264599. The next prime is 20264689. The reversal of 20264609 is 90646202.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 13162384 + 7102225 = 3628^2 + 2665^2 .

It is a cyclic number.

It is not a de Polignac number, because 20264609 - 2⁴ = 20264593 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (20264689) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10132304 + 10132305.

It is an arithmetic number, because the mean of its divisors is an integer number (10132305).

Almost surely, 2^20264609 is an apocalyptic number.

It is an amenable number.

20264609 is a deficient number, since it is larger than the sum of its proper divisors (1).

20264609 is an equidigital number, since it uses as much as digits as its factorization.

20264609 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5184, while the sum is 29.

The square root of 20264609 is about 4501.6229295666. The cubic root of 20264609 is about 272.6336196248.

The spelling of 20264609 in words is "twenty million, two hundred sixty-four thousand, six hundred nine".