20677827656 has 32 divisors (see below), whose sum is σ = 39121790400. Its totient is φ = 10245681600.

The previous prime is 20677827589. The next prime is 20677827673. The reversal of 20677827656 is 65672877602.

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, 485726 + ... + 526578.

It is an arithmetic number, because the mean of its divisors is an integer number (1222555950).

Almost surely, 2^20677827656 is an apocalyptic number.

It is an amenable number.

20677827656 is a deficient number, since it is larger than the sum of its proper divisors (18443962744).

20677827656 is a wasteful number, since it uses less digits than its factorization.

20677827656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41429 (or 41425 counting only the distinct ones).

The product of its (nonzero) digits is 11854080, while the sum is 56.

The spelling of 20677827656 in words is "twenty billion, six hundred seventy-seven million, eight hundred twenty-seven thousand, six hundred fifty-six".