21886141 has 2 divisors, whose sum is σ = 21886142. Its totient is φ = 21886140.

The previous prime is 21886127. The next prime is 21886181. The reversal of 21886141 is 14168812.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 19545241 + 2340900 = 4421^2 + 1530^2 .

It is a cyclic number.

It is not a de Polignac number, because 21886141 - 2¹⁵ = 21853373 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21886181) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10943070 + 10943071.

It is an arithmetic number, because the mean of its divisors is an integer number (10943071).

Almost surely, 2^21886141 is an apocalyptic number.

It is an amenable number.

21886141 is a deficient number, since it is larger than the sum of its proper divisors (1).

21886141 is an equidigital number, since it uses as much as digits as its factorization.

21886141 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3072, while the sum is 31.

The square root of 21886141 is about 4678.2626048566. The cubic root of 21886141 is about 279.7197067517.

The spelling of 21886141 in words is "twenty-one million, eight hundred eighty-six thousand, one hundred forty-one".