20608925 has 12 divisors (see below), whose sum is σ = 25760256. Its totient is φ = 16354800.

The previous prime is 20608873. The next prime is 20608927. The reversal of 20608925 is 52980602.

20608925 = 2620² + 2621² + 2622².

It is a de Polignac number, because none of the positive numbers 2^k-20608925 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20608891 and 20608900.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20608927) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 71 + ... + 6420.

It is an arithmetic number, because the mean of its divisors is an integer number (2146688).

Almost surely, 2^20608925 is an apocalyptic number.

20608925 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

20608925 is a deficient number, since it is larger than the sum of its proper divisors (5151331).

20608925 is a wasteful number, since it uses less digits than its factorization.

20608925 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6628 (or 6623 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 32.

The square root of 20608925 is about 4539.7053869166. The cubic root of 20608925 is about 274.1690620207.

The spelling of 20608925 in words is "twenty million, six hundred eight thousand, nine hundred twenty-five".