20065604 has 12 divisors (see below), whose sum is σ = 37816044. Its totient is φ = 9261024.

The previous prime is 20065597. The next prime is 20065607. The reversal of 20065604 is 40656002.

It can be written as a sum of positive squares in 2 ways, for example, as 4840000 + 15225604 = 2200^2 + 3902^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 20065604.

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, 192887 + ... + 192990.

It is an arithmetic number, because the mean of its divisors is an integer number (3151337).

Almost surely, 2^20065604 is an apocalyptic number.

It is an amenable number.

20065604 is a deficient number, since it is larger than the sum of its proper divisors (17750440).

20065604 is a wasteful number, since it uses less digits than its factorization.

20065604 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 385894 (or 385892 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 23.

The square root of 20065604 is about 4479.4647001623. The cubic root of 20065604 is about 271.7382321568.

The spelling of 20065604 in words is "twenty million, sixty-five thousand, six hundred four".