20959025 has 12 divisors (see below), whose sum is σ = 26886300. Its totient is φ = 16188480.

The previous prime is 20959021. The next prime is 20959073. The reversal of 20959025 is 52095902.

20959025 is nontrivially palindromic in base 16.

It can be written as a sum of positive squares in 6 ways, for example, as 1236544 + 19722481 = 1112^2 + 4441^2 .

It is not a de Polignac number, because 20959025 - 2² = 20959021 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20958982 and 20959000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20959021) 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, 13730 + ... + 15179.

It is an arithmetic number, because the mean of its divisors is an integer number (2240525).

Almost surely, 2^20959025 is an apocalyptic number.

20959025 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

20959025 is a deficient number, since it is larger than the sum of its proper divisors (5927275).

20959025 is a wasteful number, since it uses less digits than its factorization.

20959025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28948 (or 28943 counting only the distinct ones).

The product of its (nonzero) digits is 8100, while the sum is 32.

The square root of 20959025 is about 4578.1027729836. The cubic root of 20959025 is about 275.7128612519.

The spelling of 20959025 in words is "twenty million, nine hundred fifty-nine thousand, twenty-five".