21411006 has 8 divisors (see below), whose sum is σ = 42822024. Its totient is φ = 7137000.

The previous prime is 21410981. The next prime is 21411011. The reversal of 21411006 is 60011412.

It is a sphenic number, since it is the product of 3 distinct primes.

21411006 is an admirable number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1784245 + ... + 1784256.

It is an arithmetic number, because the mean of its divisors is an integer number (5352753).

Almost surely, 2^21411006 is an apocalyptic number.

21411006 is the 2927-th centered pentagonal number.

21411006 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21411006 is a wasteful number, since it uses less digits than its factorization.

21411006 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3568506.

The product of its (nonzero) digits is 48, while the sum is 15.

The square root of 21411006 is about 4627.2028267626. The cubic root of 21411006 is about 277.6806971804.

Adding to 21411006 its reverse (60011412), we get a palindrome (81422418).

The spelling of 21411006 in words is "twenty-one million, four hundred eleven thousand, six".