21868628189941 has 16 divisors (see below), whose sum is σ = 23602186206144. Its totient is φ = 20142410125824.

The previous prime is 21868628189927. The next prime is 21868628189971. The reversal of 21868628189941 is 14998182686812.

It is a cyclic number.

It is not a de Polignac number, because 21868628189941 - 2¹¹ = 21868628187893 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21868628189911) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 202577806 + ... + 202685728.

It is an arithmetic number, because the mean of its divisors is an integer number (1475136637884).

Almost surely, 2^{21868628189941} is an apocalyptic number.

It is an amenable number.

21868628189941 is a deficient number, since it is larger than the sum of its proper divisors (1733558016203).

21868628189941 is a wasteful number, since it uses less digits than its factorization.

21868628189941 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 141780.

The product of its digits is 191102976, while the sum is 73.

The spelling of 21868628189941 in words is "twenty-one trillion, eight hundred sixty-eight billion, six hundred twenty-eight million, one hundred eighty-nine thousand, nine hundred forty-one".