21411086 has 16 divisors (see below), whose sum is σ = 33365520. Its totient is φ = 10296000.

The previous prime is 21411083. The next prime is 21411107. The reversal of 21411086 is 68011412.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21411083) 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, 4961 + ... + 8211.

It is an arithmetic number, because the mean of its divisors is an integer number (2085345).

Almost surely, 2^21411086 is an apocalyptic number.

21411086 is a deficient number, since it is larger than the sum of its proper divisors (11954434).

21411086 is a wasteful number, since it uses less digits than its factorization.

21411086 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3379.

The product of its (nonzero) digits is 384, while the sum is 23.

The square root of 21411086 is about 4627.2114712859. The cubic root of 21411086 is about 277.6810430217.

Adding to 21411086 its reverse (68011412), we get a palindrome (89422498).

The spelling of 21411086 in words is "twenty-one million, four hundred eleven thousand, eighty-six".