20773746455 has 24 divisors (see below), whose sum is σ = 31315141536. Its totient is φ = 12949865280.

The previous prime is 20773746449. The next prime is 20773746467. The reversal of 20773746455 is 55464737702.

It is not a de Polignac number, because 20773746455 - 2⁸ = 20773746199 is a prime.

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, 2448392 + ... + 2456861.

It is an arithmetic number, because the mean of its divisors is an integer number (1304797564).

Almost surely, 2^20773746455 is an apocalyptic number.

20773746455 is a deficient number, since it is larger than the sum of its proper divisors (10541395081).

20773746455 is a wasteful number, since it uses less digits than its factorization.

20773746455 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4905287 (or 4905276 counting only the distinct ones).

The product of its (nonzero) digits is 4939200, while the sum is 50.

The spelling of 20773746455 in words is "twenty billion, seven hundred seventy-three million, seven hundred forty-six thousand, four hundred fifty-five".