20425604 has 12 divisors (see below), whose sum is σ = 36006684. Its totient is φ = 10137984.

The previous prime is 20425597. The next prime is 20425607. The reversal of 20425604 is 40652402.

It can be written as a sum of positive squares in 2 ways, for example, as 13912900 + 6512704 = 3730^2 + 2552^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 20425604.

It is not an unprimeable number, because it can be changed into a prime (20425607) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18089 + ... + 19184.

It is an arithmetic number, because the mean of its divisors is an integer number (3000557).

Almost surely, 2^20425604 is an apocalyptic number.

It is an amenable number.

20425604 is a deficient number, since it is larger than the sum of its proper divisors (15581080).

20425604 is a wasteful number, since it uses less digits than its factorization.

20425604 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37414 (or 37412 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 23.

The square root of 20425604 is about 4519.4694378876. The cubic root of 20425604 is about 273.3537079134.

The spelling of 20425604 in words is "twenty million, four hundred twenty-five thousand, six hundred four".