20773703664 has 120 divisors (see below), whose sum is σ = 69363514320. Its totient is φ = 5935337856.

The previous prime is 20773703653. The next prime is 20773703683. The reversal of 20773703664 is 46630737702.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 469519 + ... + 511854.

It is an arithmetic number, because the mean of its divisors is an integer number (578029286).

Almost surely, 2^20773703664 is an apocalyptic number.

20773703664 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

20773703664 is an abundant number, since it is smaller than the sum of its proper divisors (48589810656).

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

20773703664 is a wasteful number, since it uses less digits than its factorization.

20773703664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 981404 (or 981385 counting only the distinct ones).

The product of its (nonzero) digits is 889056, while the sum is 45.

The spelling of 20773703664 in words is "twenty billion, seven hundred seventy-three million, seven hundred three thousand, six hundred sixty-four".