20686325 has 12 divisors (see below), whose sum is σ = 27983328. Its totient is φ = 15044400.

The previous prime is 20686313. The next prime is 20686333. The reversal of 20686325 is 52368602.

It is not a de Polignac number, because 20686325 - 2⁶ = 20686261 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20686291 and 20686300.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 37337 + ... + 37886.

It is an arithmetic number, because the mean of its divisors is an integer number (2331944).

Almost surely, 2^20686325 is an apocalyptic number.

20686325 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

20686325 is a deficient number, since it is larger than the sum of its proper divisors (7297003).

20686325 is a wasteful number, since it uses less digits than its factorization.

20686325 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 75244 (or 75239 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 32.

The square root of 20686325 is about 4548.2221801491. Note that the first 3 decimals coincide. The cubic root of 20686325 is about 274.5118613149.

The spelling of 20686325 in words is "twenty million, six hundred eighty-six thousand, three hundred twenty-five".