21410416 has 20 divisors (see below), whose sum is σ = 43666600. Its totient is φ = 10141632.

The previous prime is 21410407. The next prime is 21410419. The reversal of 21410416 is 61401412.

It is a Harshad number since it is a multiple of its sum of digits (19).

It is a junction number, because it is equal to n+sod(n) for n = 21410393 and 21410402.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21410419) by changing a digit.

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, 34911 + ... + 35518.

It is an arithmetic number, because the mean of its divisors is an integer number (2183330).

Almost surely, 2^21410416 is an apocalyptic number.

It is an amenable number.

21410416 is an abundant number, since it is smaller than the sum of its proper divisors (22256184).

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

21410416 is a wasteful number, since it uses less digits than its factorization.

21410416 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70456 (or 70450 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 19.

The square root of 21410416 is about 4627.1390729046. The cubic root of 21410416 is about 277.6781465745.

Adding to 21410416 its reverse (61401412), we get a palindrome (82811828).

The spelling of 21410416 in words is "twenty-one million, four hundred ten thousand, four hundred sixteen".