20065601 has 4 divisors (see below), whose sum is σ = 20102832. Its totient is φ = 20028372.

The previous prime is 20065597. The next prime is 20065607. The reversal of 20065601 is 10656002.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 20065601 - 2² = 20065597 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20065607) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17795 + ... + 18888.

It is an arithmetic number, because the mean of its divisors is an integer number (5025708).

Almost surely, 2^20065601 is an apocalyptic number.

It is an amenable number.

20065601 is a deficient number, since it is larger than the sum of its proper divisors (37231).

20065601 is an equidigital number, since it uses as much as digits as its factorization.

20065601 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37230.

The product of its (nonzero) digits is 360, while the sum is 20.

The square root of 20065601 is about 4479.4643653008. The cubic root of 20065601 is about 271.7382186143.

The spelling of 20065601 in words is "twenty million, sixty-five thousand, six hundred one".