20684325 has 24 divisors (see below), whose sum is σ = 36211968. Its totient is φ = 10382080.

The previous prime is 20684317. The next prime is 20684341. The reversal of 20684325 is 52348602.

It is not a de Polignac number, because 20684325 - 2³ = 20684317 is a prime.

It is a hoax number, since the sum of its digits (30) coincides with the sum of the digits of its distinct prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 20684292 and 20684301.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 6837 + ... + 9386.

It is an arithmetic number, because the mean of its divisors is an integer number (1508832).

Almost surely, 2^20684325 is an apocalyptic number.

20684325 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

20684325 is a deficient number, since it is larger than the sum of its proper divisors (15527643).

20684325 is a wasteful number, since it uses less digits than its factorization.

20684325 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16253 (or 16248 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 30.

The square root of 20684325 is about 4548.0023087065. The cubic root of 20684325 is about 274.5030142237.

The spelling of 20684325 in words is "twenty million, six hundred eighty-four thousand, three hundred twenty-five".