20562216428 has 12 divisors (see below), whose sum is σ = 38751869520. Its totient is φ = 9490253712.

The previous prime is 20562216419. The next prime is 20562216443. The reversal of 20562216428 is 82461226502.

It is a junction number, because it is equal to n+sod(n) for n = 20562216391 and 20562216400.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 197713568 + ... + 197713671.

It is an arithmetic number, because the mean of its divisors is an integer number (3229322460).

Almost surely, 2^20562216428 is an apocalyptic number.

It is an amenable number.

20562216428 is a deficient number, since it is larger than the sum of its proper divisors (18189653092).

20562216428 is a wasteful number, since it uses less digits than its factorization.

20562216428 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 395427256 (or 395427254 counting only the distinct ones).

The product of its (nonzero) digits is 92160, while the sum is 38.

The spelling of 20562216428 in words is "twenty billion, five hundred sixty-two million, two hundred sixteen thousand, four hundred twenty-eight".