21411376 has 20 divisors (see below), whose sum is σ = 47411152. Its totient is φ = 9176256.

The previous prime is 21411361. The next prime is 21411407. The reversal of 21411376 is 67311412.

It is a self number, because there is not a number n which added to its sum of digits gives 21411376.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 95475 + ... + 95698.

Almost surely, 2^21411376 is an apocalyptic number.

It is an amenable number.

21411376 is an abundant number, since it is smaller than the sum of its proper divisors (25999776).

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

21411376 is a wasteful number, since it uses less digits than its factorization.

21411376 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 191188 (or 191182 counting only the distinct ones).

The product of its digits is 1008, while the sum is 25.

The square root of 21411376 is about 4627.2428075475. The cubic root of 21411376 is about 277.6822966890.

Adding to 21411376 its reverse (67311412), we get a palindrome (88722788).

The spelling of 21411376 in words is "twenty-one million, four hundred eleven thousand, three hundred seventy-six".