20773439672 has 16 divisors (see below), whose sum is σ = 39314221560. Its totient is φ = 10289647264.

The previous prime is 20773439669. The next prime is 20773439693. The reversal of 20773439672 is 27693437702.

It is a self number, because there is not a number n which added to its sum of digits gives 20773439672.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12133163 + ... + 12134874.

Almost surely, 2^20773439672 is an apocalyptic number.

It is an amenable number.

20773439672 is a deficient number, since it is larger than the sum of its proper divisors (18540781888).

20773439672 is a wasteful number, since it uses less digits than its factorization.

20773439672 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24268150 (or 24268146 counting only the distinct ones).

The product of its (nonzero) digits is 2667168, while the sum is 50.

The spelling of 20773439672 in words is "twenty billion, seven hundred seventy-three million, four hundred thirty-nine thousand, six hundred seventy-two".