21769785114 has 64 divisors (see below), whose sum is σ = 54479388672. Its totient is φ = 5634043200.

The previous prime is 21769785083. The next prime is 21769785119. The reversal of 21769785114 is 41158796712.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (21769785119) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 42919 + ... + 213029.

It is an arithmetic number, because the mean of its divisors is an integer number (851240448).

Almost surely, 2^21769785114 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21769785114, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27239694336).

21769785114 is an abundant number, since it is smaller than the sum of its proper divisors (32709603558).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21769785114 is a wasteful number, since it uses less digits than its factorization.

21769785114 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 170411.

The product of its digits is 846720, while the sum is 51.

The spelling of 21769785114 in words is "twenty-one billion, seven hundred sixty-nine million, seven hundred eighty-five thousand, one hundred fourteen".