20793977144 has 16 divisors (see below), whose sum is σ = 39093240120. Its totient is φ = 10369113120.

The previous prime is 20793977137. The next prime is 20793977147. The reversal of 20793977144 is 44177939702.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20793977147) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 3481262 + ... + 3487229.

Almost surely, 2^20793977144 is an apocalyptic number.

It is an amenable number.

20793977144 is a deficient number, since it is larger than the sum of its proper divisors (18299262976).

20793977144 is a wasteful number, since it uses less digits than its factorization.

20793977144 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6968870 (or 6968866 counting only the distinct ones).

The product of its (nonzero) digits is 2667168, while the sum is 53.

The spelling of 20793977144 in words is "twenty billion, seven hundred ninety-three million, nine hundred seventy-seven thousand, one hundred forty-four".