20725203 has 8 divisors (see below), whose sum is σ = 27817216. Its totient is φ = 13725000.

The previous prime is 20725171. The next prime is 20725241. The reversal of 20725203 is 30252702.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 20725203 - 2⁵ = 20725171 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20725203.

It is not an unprimeable number, because it can be changed into a prime (20725273) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 22423 + ... + 23328.

It is an arithmetic number, because the mean of its divisors is an integer number (3477152).

Almost surely, 2^20725203 is an apocalyptic number.

20725203 is a deficient number, since it is larger than the sum of its proper divisors (7092013).

20725203 is a wasteful number, since it uses less digits than its factorization.

20725203 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45905.

The product of its (nonzero) digits is 840, while the sum is 21.

The square root of 20725203 is about 4552.4941515613. The cubic root of 20725203 is about 274.6837267566.

Adding to 20725203 its reverse (30252702), we get a palindrome (50977905).

The spelling of 20725203 in words is "twenty million, seven hundred twenty-five thousand, two hundred three".