20680825 has 24 divisors (see below), whose sum is σ = 28212480. Its totient is φ = 14913600.

The previous prime is 20680811. The next prime is 20680831. The reversal of 20680825 is 52808602.

It is not a de Polignac number, because 20680825 - 2⁷ = 20680697 is a prime.

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 23 ways as a sum of consecutive naturals, for example, 42936 + ... + 43414.

It is an arithmetic number, because the mean of its divisors is an integer number (1175520).

Almost surely, 2^20680825 is an apocalyptic number.

20680825 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

20680825 is a deficient number, since it is larger than the sum of its proper divisors (7531655).

20680825 is a wasteful number, since it uses less digits than its factorization.

20680825 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 657 (or 652 counting only the distinct ones).

The product of its (nonzero) digits is 7680, while the sum is 31.

The square root of 20680825 is about 4547.6175081025. The cubic root of 20680825 is about 274.4875304415.

The spelling of 20680825 in words is "twenty million, six hundred eighty thousand, eight hundred twenty-five".