20983444 has 6 divisors (see below), whose sum is σ = 36721034. Its totient is φ = 10491720.

The previous prime is 20983439. The next prime is 20983453. The reversal of 20983444 is 44438902.

It can be written as a sum of positive squares in only one way, i.e., 15507844 + 5475600 = 3938^2 + 2340^2 .

It is a super-2 number, since 2×20983444² = 880609844202272, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2622927 + ... + 2622934.

Almost surely, 2^20983444 is an apocalyptic number.

It is an amenable number.

20983444 is a deficient number, since it is larger than the sum of its proper divisors (15737590).

20983444 is a wasteful number, since it uses less digits than its factorization.

20983444 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5245865 (or 5245863 counting only the distinct ones).

The product of its (nonzero) digits is 27648, while the sum is 34.

The square root of 20983444 is about 4580.7689310857. The cubic root of 20983444 is about 275.8198958008.

The spelling of 20983444 in words is "twenty million, nine hundred eighty-three thousand, four hundred forty-four".