20677065784 has 16 divisors (see below), whose sum is σ = 38907472320. Its totient is φ = 10301739840.

The previous prime is 20677065781. The next prime is 20677065797. The reversal of 20677065784 is 48756077602.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20677065781) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4596744 + ... + 4601239.

It is an arithmetic number, because the mean of its divisors is an integer number (2431717020).

Almost surely, 2^20677065784 is an apocalyptic number.

It is an amenable number.

20677065784 is a deficient number, since it is larger than the sum of its proper divisors (18230406536).

20677065784 is a wasteful number, since it uses less digits than its factorization.

20677065784 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9198270 (or 9198266 counting only the distinct ones).

The product of its (nonzero) digits is 3951360, while the sum is 52.

The spelling of 20677065784 in words is "twenty billion, six hundred seventy-seven million, sixty-five thousand, seven hundred eighty-four".