20773428637 has 8 divisors (see below), whose sum is σ = 22422350720. Its totient is φ = 19131787440.

The previous prime is 20773428617. The next prime is 20773428667. The reversal of 20773428637 is 73682437702.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 20773428637 - 2¹⁵ = 20773395869 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20773428607) 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 7 ways as a sum of consecutive naturals, for example, 1814289 + ... + 1825702.

It is an arithmetic number, because the mean of its divisors is an integer number (2802793840).

Almost surely, 2^20773428637 is an apocalyptic number.

It is an amenable number.

20773428637 is a deficient number, since it is larger than the sum of its proper divisors (1648922083).

20773428637 is a wasteful number, since it uses less digits than its factorization.

20773428637 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3640443.

The product of its (nonzero) digits is 2370816, while the sum is 49.

The spelling of 20773428637 in words is "twenty billion, seven hundred seventy-three million, four hundred twenty-eight thousand, six hundred thirty-seven".