20600641 has 2 divisors, whose sum is σ = 20600642. Its totient is φ = 20600640.

The previous prime is 20600639. The next prime is 20600653. The reversal of 20600641 is 14600602.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 17808400 + 2792241 = 4220^2 + 1671^2 .

It is a cyclic number.

It is not a de Polignac number, because 20600641 - 2¹ = 20600639 is a prime.

It is a super-2 number, since 2×20600641² = 848772819221762, which contains 22 as substring.

Together with 20600639, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (20607641) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10300320 + 10300321.

It is an arithmetic number, because the mean of its divisors is an integer number (10300321).

Almost surely, 2^20600641 is an apocalyptic number.

It is an amenable number.

20600641 is a deficient number, since it is larger than the sum of its proper divisors (1).

20600641 is an equidigital number, since it uses as much as digits as its factorization.

20600641 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 288, while the sum is 19.

The square root of 20600641 is about 4538.7929012018. The cubic root of 20600641 is about 274.1323219369.

The spelling of 20600641 in words is "twenty million, six hundred thousand, six hundred forty-one".