20411225 has 24 divisors (see below), whose sum is σ = 26977440. Its totient is φ = 15275520.

The previous prime is 20411221. The next prime is 20411233. The reversal of 20411225 is 52211402.

It is not a de Polignac number, because 20411225 - 2² = 20411221 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (20411221) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 45854 + ... + 46296.

It is an arithmetic number, because the mean of its divisors is an integer number (1124060).

Almost surely, 2^20411225 is an apocalyptic number.

20411225 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

20411225 is a deficient number, since it is larger than the sum of its proper divisors (6566215).

20411225 is a wasteful number, since it uses less digits than its factorization.

20411225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 569 (or 564 counting only the distinct ones).

The product of its (nonzero) digits is 160, while the sum is 17.

The square root of 20411225 is about 4517.8783737502. The cubic root of 20411225 is about 273.2895486413.

Adding to 20411225 its reverse (52211402), we get a palindrome (72622627).

The spelling of 20411225 in words is "twenty million, four hundred eleven thousand, two hundred twenty-five".