21758786880106 has 16 divisors (see below), whose sum is σ = 32848719987744. Its totient is φ = 10809255443184.

The previous prime is 21758786880079. The next prime is 21758786880109. The reversal of 21758786880106 is 60108868785712.

It is not an unprimeable number, because it can be changed into a prime (21758786880109) 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, 9432445 + ... + 11510368.

It is an arithmetic number, because the mean of its divisors is an integer number (2053044999234).

Almost surely, 2^{21758786880106} is an apocalyptic number.

21758786880106 is a deficient number, since it is larger than the sum of its proper divisors (11089933107638).

21758786880106 is a wasteful number, since it uses less digits than its factorization.

21758786880106 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20946165.

The product of its (nonzero) digits is 72253440, while the sum is 67.

The spelling of 21758786880106 in words is "twenty-one trillion, seven hundred fifty-eight billion, seven hundred eighty-six million, eight hundred eighty thousand, one hundred six".