20616392 has 8 divisors (see below), whose sum is σ = 38655750. Its totient is φ = 10308192.

The previous prime is 20616391. The next prime is 20616397. The reversal of 20616392 is 29361602.

It can be written as a sum of positive squares in only one way, i.e., 10719076 + 9897316 = 3274^2 + 3146^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is not an unprimeable number, because it can be changed into a prime (20616391) by changing a digit.

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, 1288517 + ... + 1288532.

Almost surely, 2^20616392 is an apocalyptic number.

It is an amenable number.

20616392 is a deficient number, since it is larger than the sum of its proper divisors (18039358).

20616392 is a wasteful number, since it uses less digits than its factorization.

20616392 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2577055 (or 2577051 counting only the distinct ones).

The product of its (nonzero) digits is 3888, while the sum is 29.

The square root of 20616392 is about 4540.5277226331. The cubic root of 20616392 is about 274.2021702199.

Adding to 20616392 its reverse (29361602), we get a palindrome (49977994).

The spelling of 20616392 in words is "twenty million, six hundred sixteen thousand, three hundred ninety-two".