20520616 has 16 divisors (see below), whose sum is σ = 38570400. Its totient is φ = 10235184.

The previous prime is 20520571. The next prime is 20520629. The reversal of 20520616 is 61602502.

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, 591 + ... + 6433.

It is an arithmetic number, because the mean of its divisors is an integer number (2410650).

Almost surely, 2^20520616 is an apocalyptic number.

It is an amenable number.

20520616 is a deficient number, since it is larger than the sum of its proper divisors (18049784).

20520616 is a wasteful number, since it uses less digits than its factorization.

20520616 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6288 (or 6284 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 22.

The square root of 20520616 is about 4529.9686533132. The cubic root of 20520616 is about 273.7768976163.

The spelling of 20520616 in words is "twenty million, five hundred twenty thousand, six hundred sixteen".