20827425 has 24 divisors (see below), whose sum is σ = 34703136. Its totient is φ = 11021440.

The previous prime is 20827421. The next prime is 20827427. The reversal of 20827425 is 52472802.

It is not a de Polignac number, because 20827425 - 2² = 20827421 is a prime.

It is a hoax number, since the sum of its digits (30) coincides with the sum of the digits of its distinct prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 20827392 and 20827401.

It is not an unprimeable number, because it can be changed into a prime (20827421) 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, 9262 + ... + 11288.

It is an arithmetic number, because the mean of its divisors is an integer number (1445964).

Almost surely, 2^20827425 is an apocalyptic number.

20827425 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

20827425 is a deficient number, since it is larger than the sum of its proper divisors (13875711).

20827425 is a wasteful number, since it uses less digits than its factorization.

20827425 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2177 (or 2172 counting only the distinct ones).

The product of its (nonzero) digits is 8960, while the sum is 30.

The square root of 20827425 is about 4563.7073744928. The cubic root of 20827425 is about 275.1345897661.

The spelling of 20827425 in words is "twenty million, eight hundred twenty-seven thousand, four hundred twenty-five".