20267617 has 2 divisors, whose sum is σ = 20267618. Its totient is φ = 20267616.

The previous prime is 20267609. The next prime is 20267627. The reversal of 20267617 is 71676202.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 13133376 + 7134241 = 3624^2 + 2671^2 .

It is a cyclic number.

It is not a de Polignac number, because 20267617 - 2³ = 20267609 is a prime.

It is not a weakly prime, because it can be changed into another prime (20267627) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10133808 + 10133809.

It is an arithmetic number, because the mean of its divisors is an integer number (10133809).

Almost surely, 2^20267617 is an apocalyptic number.

It is an amenable number.

20267617 is a deficient number, since it is larger than the sum of its proper divisors (1).

20267617 is an equidigital number, since it uses as much as digits as its factorization.

20267617 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7056, while the sum is 31.

The square root of 20267617 is about 4501.9570188974. The cubic root of 20267617 is about 272.6471085166.

The spelling of 20267617 in words is "twenty million, two hundred sixty-seven thousand, six hundred seventeen".