20617701876766 has 4 divisors (see below), whose sum is σ = 30926552815152. Its totient is φ = 10308850938382.

The previous prime is 20617701876719. The next prime is 20617701876787. The reversal of 20617701876766 is 66767810771602.

It is a semiprime because it is the product of two primes.

It is a junction number, because it is equal to n+sod(n) for n = 20617701876698 and 20617701876707.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5154425469190 + ... + 5154425469193.

It is an arithmetic number, because the mean of its divisors is an integer number (7731638203788).

Almost surely, 2^{20617701876766} is an apocalyptic number.

20617701876766 is a deficient number, since it is larger than the sum of its proper divisors (10308850938386).

20617701876766 is a wasteful number, since it uses less digits than its factorization.

20617701876766 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10308850938385.

The product of its (nonzero) digits is 49787136, while the sum is 64.

The spelling of 20617701876766 in words is "twenty trillion, six hundred seventeen billion, seven hundred one million, eight hundred seventy-six thousand, seven hundred sixty-six".