20906325 has 36 divisors (see below), whose sum is σ = 40854528. Its totient is φ = 10135200.

The previous prime is 20906317. The next prime is 20906329. The reversal of 20906325 is 52360902.

20906325 is a `hidden beast` number, since 20 + 9 + 0 + 632 + 5 = 666.

It is not a de Polignac number, because 20906325 - 2³ = 20906317 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20906329) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 1749 + ... + 6698.

It is an arithmetic number, because the mean of its divisors is an integer number (1134848).

Almost surely, 2^20906325 is an apocalyptic number.

20906325 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

20906325 is a deficient number, since it is larger than the sum of its proper divisors (19948203).

20906325 is a wasteful number, since it uses less digits than its factorization.

20906325 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8474 (or 8466 counting only the distinct ones).

The product of its (nonzero) digits is 3240, while the sum is 27.

The square root of 20906325 is about 4572.3434910339. The cubic root of 20906325 is about 275.4815804058.

The spelling of 20906325 in words is "twenty million, nine hundred six thousand, three hundred twenty-five".