20604001 has 12 divisors (see below), whose sum is σ = 23135616. Its totient is φ = 18327320.

The previous prime is 20603993. The next prime is 20604011. The reversal of 20604001 is 10040602.

It is not a de Polignac number, because 20604001 - 2³ = 20603993 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20604011) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3876 + ... + 7498.

It is an arithmetic number, because the mean of its divisors is an integer number (1927968).

Almost surely, 2^20604001 is an apocalyptic number.

It is an amenable number.

20604001 is a deficient number, since it is larger than the sum of its proper divisors (2531615).

20604001 is a wasteful number, since it uses less digits than its factorization.

20604001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3692 (or 3681 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 13.

The square root of 20604001 is about 4539.1630285770. The cubic root of 20604001 is about 274.1472249445.

Adding to 20604001 its reverse (10040602), we get a palindrome (30644603).

The spelling of 20604001 in words is "twenty million, six hundred four thousand, one".