20616343 has 6 divisors (see below), whose sum is σ = 22661072. Its totient is φ = 18742020.

The previous prime is 20616331. The next prime is 20616373. The reversal of 20616343 is 34361602.

It is not a de Polignac number, because 20616343 - 2⁹ = 20615831 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20616313) 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 5 ways as a sum of consecutive naturals, for example, 85071 + ... + 85312.

Almost surely, 2^20616343 is an apocalyptic number.

20616343 is a deficient number, since it is larger than the sum of its proper divisors (2044729).

20616343 is a wasteful number, since it uses less digits than its factorization.

20616343 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 170405 (or 170394 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 25.

The square root of 20616343 is about 4540.5223267814. The cubic root of 20616343 is about 274.2019529831.

Adding to 20616343 its reverse (34361602), we get a palindrome (54977945).

The spelling of 20616343 in words is "twenty million, six hundred sixteen thousand, three hundred forty-three".