20885025 has 36 divisors (see below), whose sum is σ = 40174512. Its totient is φ = 9545760.

The previous prime is 20885003. The next prime is 20885069. The reversal of 20885025 is 52058802.

It is not a de Polignac number, because 20885025 - 2¹¹ = 20882977 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20884983 and 20885001.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 834 + ... + 6516.

Almost surely, 2^20885025 is an apocalyptic number.

20885025 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

20885025 is a deficient number, since it is larger than the sum of its proper divisors (19289487).

20885025 is a wasteful number, since it uses less digits than its factorization.

20885025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5710 (or 5698 counting only the distinct ones).

The product of its (nonzero) digits is 6400, while the sum is 30.

The square root of 20885025 is about 4570.0136761283. The cubic root of 20885025 is about 275.3879922765.

The spelling of 20885025 in words is "twenty million, eight hundred eighty-five thousand, twenty-five".