20455603777776 has 20 divisors (see below), whose sum is σ = 52843643092712. Its totient is φ = 6818534592576.

The previous prime is 20455603777747. The next prime is 20455603777787. The reversal of 20455603777776 is 67777730655402.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 213079205971 + ... + 213079206066.

Almost surely, 2^{20455603777776} is an apocalyptic number.

It is an amenable number.

20455603777776 is an abundant number, since it is smaller than the sum of its proper divisors (32388039314936).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20455603777776 is a wasteful number, since it uses less digits than its factorization.

20455603777776 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 426158412048 (or 426158412042 counting only the distinct ones).

The product of its (nonzero) digits is 363031200, while the sum is 66.

The spelling of 20455603777776 in words is "twenty trillion, four hundred fifty-five billion, six hundred three million, seven hundred seventy-seven thousand, seven hundred seventy-six".