20603625 has 64 divisors (see below), whose sum is σ = 40255488. Its totient is φ = 9163200.

The previous prime is 20603621. The next prime is 20603633. The reversal of 20603625 is 52630602.

It is not a de Polignac number, because 20603625 - 2² = 20603621 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 20603595 and 20603604.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20603621) 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 63 ways as a sum of consecutive naturals, for example, 123292 + ... + 123458.

It is an arithmetic number, because the mean of its divisors is an integer number (628992).

Almost surely, 2^20603625 is an apocalyptic number.

20603625 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

20603625 is a deficient number, since it is larger than the sum of its proper divisors (19651863).

20603625 is a wasteful number, since it uses less digits than its factorization.

20603625 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 239 (or 229 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 24.

The square root of 20603625 is about 4539.1216110609. The cubic root of 20603625 is about 274.1455573075.

The spelling of 20603625 in words is "twenty million, six hundred three thousand, six hundred twenty-five".