20767940066 has 8 divisors (see below), whose sum is σ = 31152737280. Its totient is φ = 10383694308.

The previous prime is 20767940041. The next prime is 20767940071. The reversal of 20767940066 is 66004976702.

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 20767940066.

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, 25346 + ... + 205373.

It is an arithmetic number, because the mean of its divisors is an integer number (3894092160).

Almost surely, 2^20767940066 is an apocalyptic number.

20767940066 is a deficient number, since it is larger than the sum of its proper divisors (10384797214).

20767940066 is a wasteful number, since it uses less digits than its factorization.

20767940066 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 275728.

The product of its (nonzero) digits is 762048, while the sum is 47.

The spelling of 20767940066 in words is "twenty billion, seven hundred sixty-seven million, nine hundred forty thousand, sixty-six".