21496016 has 10 divisors (see below), whose sum is σ = 41648562. Its totient is φ = 10748000.

The previous prime is 21496003. The next prime is 21496037. The reversal of 21496016 is 61069412.

It can be written as a sum of positive squares in only one way, i.e., 20286016 + 1210000 = 4504^2 + 1100^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 21496016.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 671735 + ... + 671766.

Almost surely, 2^21496016 is an apocalyptic number.

It is an amenable number.

21496016 is a deficient number, since it is larger than the sum of its proper divisors (20152546).

21496016 is a wasteful number, since it uses less digits than its factorization.

21496016 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1343509 (or 1343503 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 29.

The square root of 21496016 is about 4636.3796220758. The cubic root of 21496016 is about 278.0477119083.

The spelling of 21496016 in words is "twenty-one million, four hundred ninety-six thousand, sixteen".