20403552056 has 16 divisors (see below), whose sum is σ = 38314722600. Its totient is φ = 10186292704.

The previous prime is 20403552047. The next prime is 20403552077. The reversal of 20403552056 is 65025530402.

It is a congruent number.

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, 1929815 + ... + 1940358.

Almost surely, 2^20403552056 is an apocalyptic number.

It is an amenable number.

20403552056 is a deficient number, since it is larger than the sum of its proper divisors (17911170544).

20403552056 is a wasteful number, since it uses less digits than its factorization.

20403552056 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3870838 (or 3870834 counting only the distinct ones).

The product of its (nonzero) digits is 36000, while the sum is 32.

The spelling of 20403552056 in words is "twenty billion, four hundred three million, five hundred fifty-two thousand, fifty-six".