20773391186 has 8 divisors (see below), whose sum is σ = 32234572620. Its totient is φ = 10028533648.

The previous prime is 20773391161. The next prime is 20773391189. The reversal of 20773391186 is 68119337702.

It can be written as a sum of positive squares in 2 ways, for example, as 20744928961 + 28462225 = 144031^2 + 5335^2 .

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

It is a self number, because there is not a number n which added to its sum of digits gives 20773391186.

It is not an unprimeable number, because it can be changed into a prime (20773391189) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 179080901 + ... + 179081016.

Almost surely, 2^20773391186 is an apocalyptic number.

20773391186 is a deficient number, since it is larger than the sum of its proper divisors (11461181434).

20773391186 is a wasteful number, since it uses less digits than its factorization.

20773391186 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 358161948.

The product of its (nonzero) digits is 381024, while the sum is 47.

The spelling of 20773391186 in words is "twenty billion, seven hundred seventy-three million, three hundred ninety-one thousand, one hundred eighty-six".