20816552 has 16 divisors (see below), whose sum is σ = 41085600. Its totient is φ = 9860400.

The previous prime is 20816539. The next prime is 20816569. The reversal of 20816552 is 25561802.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 68324 + ... + 68627.

It is an arithmetic number, because the mean of its divisors is an integer number (2567850).

Almost surely, 2^20816552 is an apocalyptic number.

It is an amenable number.

20816552 is a deficient number, since it is larger than the sum of its proper divisors (20269048).

20816552 is a wasteful number, since it uses less digits than its factorization.

20816552 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 136976 (or 136972 counting only the distinct ones).

The product of its (nonzero) digits is 4800, while the sum is 29.

The square root of 20816552 is about 4562.5159725748. The cubic root of 20816552 is about 275.0867032395.

The spelling of 20816552 in words is "twenty million, eight hundred sixteen thousand, five hundred fifty-two".