21241016 has 8 divisors (see below), whose sum is σ = 39826920. Its totient is φ = 10620504.

The previous prime is 21241013. The next prime is 21241037. The reversal of 21241016 is 61014212.

It is a tau number, because it is divible by the number of its divisors (8).

It is a junction number, because it is equal to n+sod(n) for n = 21240985 and 21241003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21241013) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1327556 + ... + 1327571.

It is an arithmetic number, because the mean of its divisors is an integer number (4978365).

Almost surely, 2^21241016 is an apocalyptic number.

It is an amenable number.

21241016 is a deficient number, since it is larger than the sum of its proper divisors (18585904).

21241016 is a wasteful number, since it uses less digits than its factorization.

21241016 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2655133 (or 2655129 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 17.

The square root of 21241016 is about 4608.7976740143. The cubic root of 21241016 is about 276.9438733828.

Adding to 21241016 its reverse (61014212), we get a palindrome (82255228).

The spelling of 21241016 in words is "twenty-one million, two hundred forty-one thousand, sixteen".