20206825 has 12 divisors (see below), whose sum is σ = 25114588. Its totient is φ = 16128000.

The previous prime is 20206819. The next prime is 20206853. The reversal of 20206825 is 52860202.

It can be written as a sum of positive squares in 6 ways, for example, as 6487209 + 13719616 = 2547^2 + 3704^2 .

It is not a de Polignac number, because 20206825 - 2³ = 20206817 is a prime.

It is a hoax number, since the sum of its digits (25) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (25).

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20206825.

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, 16225 + ... + 17425.

Almost surely, 2^20206825 is an apocalyptic number.

20206825 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

20206825 is a deficient number, since it is larger than the sum of its proper divisors (4907763).

20206825 is a wasteful number, since it uses less digits than its factorization.

20206825 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1884 (or 1879 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 25.

The square root of 20206825 is about 4495.2002180103. The cubic root of 20206825 is about 272.3742370604.

The spelling of 20206825 in words is "twenty million, two hundred six thousand, eight hundred twenty-five".