20619344 has 10 divisors (see below), whose sum is σ = 39950010. Its totient is φ = 10309664.

The previous prime is 20619331. The next prime is 20619349. The reversal of 20619344 is 44391602.

It can be written as a sum of positive squares in only one way, i.e., 20611600 + 7744 = 4540^2 + 88^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20619349) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 644339 + ... + 644370.

It is an arithmetic number, because the mean of its divisors is an integer number (3995001).

Almost surely, 2^20619344 is an apocalyptic number.

It is an amenable number.

20619344 is a deficient number, since it is larger than the sum of its proper divisors (19330666).

20619344 is a wasteful number, since it uses less digits than its factorization.

20619344 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1288717 (or 1288711 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 29.

The square root of 20619344 is about 4540.8527833437. The cubic root of 20619344 is about 274.2152569937.

The spelling of 20619344 in words is "twenty million, six hundred nineteen thousand, three hundred forty-four".