21014086 has 4 divisors (see below), whose sum is σ = 31521132. Its totient is φ = 10507042.

The previous prime is 21014069. The next prime is 21014087. The reversal of 21014086 is 68041012.

It is a semiprime because it is the product of two primes.

It is a Smith number, since the sum of its digits (22) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21014087) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5253520 + ... + 5253523.

It is an arithmetic number, because the mean of its divisors is an integer number (7880283).

Almost surely, 2^21014086 is an apocalyptic number.

21014086 is a deficient number, since it is larger than the sum of its proper divisors (10507046).

21014086 is a wasteful number, since it uses less digits than its factorization.

21014086 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10507045.

The product of its (nonzero) digits is 384, while the sum is 22.

The square root of 21014086 is about 4584.1123459182. The cubic root of 21014086 is about 275.9540898922.

Adding to 21014086 its reverse (68041012), we get a palindrome (89055098).

The spelling of 21014086 in words is "twenty-one million, fourteen thousand, eighty-six".