20289044 has 6 divisors (see below), whose sum is σ = 35505834. Its totient is φ = 10144520.

The previous prime is 20289029. The next prime is 20289053. The reversal of 20289044 is 44098202.

It can be written as a sum of positive squares in only one way, i.e., 16240900 + 4048144 = 4030^2 + 2012^2 .

It is a junction number, because it is equal to n+sod(n) for n = 20288998 and 20289016.

It is a congruent number.

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 as a sum of consecutive naturals, namely, 2536127 + ... + 2536134.

It is an arithmetic number, because the mean of its divisors is an integer number (5917639).

Almost surely, 2^20289044 is an apocalyptic number.

It is an amenable number.

20289044 is a deficient number, since it is larger than the sum of its proper divisors (15216790).

20289044 is a wasteful number, since it uses less digits than its factorization.

20289044 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5072265 (or 5072263 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 29.

The square root of 20289044 is about 4504.3361331055. The cubic root of 20289044 is about 272.7431558561.

The spelling of 20289044 in words is "twenty million, two hundred eighty-nine thousand, forty-four".