20765025 has 24 divisors (see below), whose sum is σ = 38147360. Its totient is φ = 11074320.

The previous prime is 20764999. The next prime is 20765027. The reversal of 20765025 is 52056702.

20765025 is a `hidden beast` number, since 2 + 0 + 7 + 650 + 2 + 5 = 666.

It is not a de Polignac number, because 20765025 - 2⁷ = 20764897 is a prime.

It is a hoax number, since the sum of its digits (27) 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 (27).

It is a self number, because there is not a number n which added to its sum of digits gives 20765025.

It is not an unprimeable number, because it can be changed into a prime (20765027) by changing a digit.

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 23 ways as a sum of consecutive naturals, for example, 14707 + ... + 16056.

Almost surely, 2^20765025 is an apocalyptic number.

20765025 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

20765025 is a deficient number, since it is larger than the sum of its proper divisors (17382335).

20765025 is a wasteful number, since it uses less digits than its factorization.

20765025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30782 (or 30771 counting only the distinct ones).

The product of its (nonzero) digits is 4200, while the sum is 27.

The square root of 20765025 is about 4556.8656991401. The cubic root of 20765025 is about 274.8595425981.

The spelling of 20765025 in words is "twenty million, seven hundred sixty-five thousand, twenty-five".