20768189111 has 8 divisors (see below), whose sum is σ = 22024164384. Its totient is φ = 19516026880.

The previous prime is 20768189107. The next prime is 20768189119. The reversal of 20768189111 is 11198186702.

It is a happy number.

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 20768189111 - 2² = 20768189107 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 (20768189119) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 942035 + ... + 963828.

It is an arithmetic number, because the mean of its divisors is an integer number (2753020548).

Almost surely, 2^20768189111 is an apocalyptic number.

20768189111 is a deficient number, since it is larger than the sum of its proper divisors (1255975273).

20768189111 is a wasteful number, since it uses less digits than its factorization.

20768189111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1906521.

The product of its (nonzero) digits is 48384, while the sum is 44.

The spelling of 20768189111 in words is "twenty billion, seven hundred sixty-eight million, one hundred eighty-nine thousand, one hundred eleven".