20344516 has 36 divisors (see below), whose sum is σ = 38287452. Its totient is φ = 9455616.

The previous prime is 20344507. The next prime is 20344517. The reversal of 20344516 is 61544302.

It can be written as a sum of positive squares in 2 ways, for example, as 8122500 + 12222016 = 2850^2 + 3496^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20344517) by changing a digit.

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 11 ways as a sum of consecutive naturals, for example, 105316 + ... + 105508.

Almost surely, 2^20344516 is an apocalyptic number.

It is an amenable number.

20344516 is a deficient number, since it is larger than the sum of its proper divisors (17942936).

20344516 is a wasteful number, since it uses less digits than its factorization.

20344516 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 308 (or 287 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 25.

The square root of 20344516 is about 4510.4895521440. The cubic root of 20344516 is about 272.9914974520.

Adding to 20344516 its reverse (61544302), we get a palindrome (81888818).

The spelling of 20344516 in words is "twenty million, three hundred forty-four thousand, five hundred sixteen".