20617741 has 2 divisors, whose sum is σ = 20617742. Its totient is φ = 20617740.

The previous prime is 20617739. The next prime is 20617763. The reversal of 20617741 is 14771602.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 10562500 + 10055241 = 3250^2 + 3171^2 .

It is a cyclic number.

It is not a de Polignac number, because 20617741 - 2¹ = 20617739 is a prime.

Together with 20617739, 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 (20617771) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10308870 + 10308871.

It is an arithmetic number, because the mean of its divisors is an integer number (10308871).

Almost surely, 2^20617741 is an apocalyptic number.

It is an amenable number.

20617741 is a deficient number, since it is larger than the sum of its proper divisors (1).

20617741 is an equidigital number, since it uses as much as digits as its factorization.

20617741 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2352, while the sum is 28.

The square root of 20617741 is about 4540.6762712178. The cubic root of 20617741 is about 274.2081507468.

The spelling of 20617741 in words is "twenty million, six hundred seventeen thousand, seven hundred forty-one".