20828468 has 12 divisors (see below), whose sum is σ = 38594052. Its totient is φ = 9801600.

The previous prime is 20828459. The next prime is 20828471. The reversal of 20828468 is 86482802.

It can be written as a sum of positive squares in 2 ways, for example, as 18079504 + 2748964 = 4252^2 + 1658^2 .

It is a congruent number.

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 3 ways as a sum of consecutive naturals, for example, 153083 + ... + 153218.

It is an arithmetic number, because the mean of its divisors is an integer number (3216171).

Almost surely, 2^20828468 is an apocalyptic number.

It is an amenable number.

20828468 is a deficient number, since it is larger than the sum of its proper divisors (17765584).

20828468 is a wasteful number, since it uses less digits than its factorization.

20828468 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 306322 (or 306320 counting only the distinct ones).

The product of its (nonzero) digits is 49152, while the sum is 38.

The square root of 20828468 is about 4563.8216441925. The cubic root of 20828468 is about 275.1391824379.

The spelling of 20828468 in words is "twenty million, eight hundred twenty-eight thousand, four hundred sixty-eight".