20842084 has 24 divisors (see below), whose sum is σ = 37314648. Its totient is φ = 10183680.

The previous prime is 20842049. The next prime is 20842093. The reversal of 20842084 is 48024802.

It can be written as a sum of positive squares in 4 ways, for example, as 2592100 + 18249984 = 1610^2 + 4272^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 39744 + ... + 40264.

It is an arithmetic number, because the mean of its divisors is an integer number (1554777).

Almost surely, 2^20842084 is an apocalyptic number.

It is an amenable number.

20842084 is a deficient number, since it is larger than the sum of its proper divisors (16472564).

20842084 is a wasteful number, since it uses less digits than its factorization.

20842084 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 735 (or 733 counting only the distinct ones).

The product of its (nonzero) digits is 4096, while the sum is 28.

The square root of 20842084 is about 4565.3131327435. The cubic root of 20842084 is about 275.1991241015.

Adding to 20842084 its reverse (48024802), we get a palindrome (68866886).

The spelling of 20842084 in words is "twenty million, eight hundred forty-two thousand, eighty-four".