20553600566 has 16 divisors (see below), whose sum is σ = 31776369120. Its totient is φ = 9963455040.

The previous prime is 20553600541. The next prime is 20553600583. The reversal of 20553600566 is 66500635502.

20553600566 is digitally balanced in base 5, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 473426 + ... + 515013.

It is an arithmetic number, because the mean of its divisors is an integer number (1986023070).

Almost surely, 2^20553600566 is an apocalyptic number.

20553600566 is a deficient number, since it is larger than the sum of its proper divisors (11222768554).

20553600566 is a wasteful number, since it uses less digits than its factorization.

20553600566 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 988759.

The product of its (nonzero) digits is 162000, while the sum is 38.

The spelling of 20553600566 in words is "twenty billion, five hundred fifty-three million, six hundred thousand, five hundred sixty-six".