20613044 has 24 divisors (see below), whose sum is σ = 38388168. Its totient is φ = 9651200.

The previous prime is 20613031. The next prime is 20613053. The reversal of 20613044 is 44031602.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 1444 + 20611600 = 38^2 + 4540^2 .

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 7 ways as a sum of consecutive naturals, for example, 15194 + ... + 16494.

It is an arithmetic number, because the mean of its divisors is an integer number (1599507).

Almost surely, 2^20613044 is an apocalyptic number.

It is an amenable number.

20613044 is a deficient number, since it is larger than the sum of its proper divisors (17775124).

20613044 is a wasteful number, since it uses less digits than its factorization.

20613044 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1555 (or 1553 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 20.

The square root of 20613044 is about 4540.1590280518. The cubic root of 20613044 is about 274.1873263914.

Adding to 20613044 its reverse (44031602), we get a palindrome (64644646).

The spelling of 20613044 in words is "twenty million, six hundred thirteen thousand, forty-four".