20825207 has 8 divisors (see below), whose sum is σ = 22529136. Its totient is φ = 19135872.

The previous prime is 20825177. The next prime is 20825209. The reversal of 20825207 is 70252802.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 20825207 - 2¹⁶ = 20759671 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20825209) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 578 + ... + 6479.

It is an arithmetic number, because the mean of its divisors is an integer number (2816142).

Almost surely, 2^20825207 is an apocalyptic number.

20825207 is a deficient number, since it is larger than the sum of its proper divisors (1703929).

20825207 is a wasteful number, since it uses less digits than its factorization.

20825207 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7297.

The product of its (nonzero) digits is 2240, while the sum is 26.

The square root of 20825207 is about 4563.4643638359. The cubic root of 20825207 is about 275.1248226732.

The spelling of 20825207 in words is "twenty million, eight hundred twenty-five thousand, two hundred seven".