21847016 has 16 divisors (see below), whose sum is σ = 41172000. Its totient is φ = 10867824.

The previous prime is 21847013. The next prime is 21847027. The reversal of 21847016 is 61074812.

It is a self number, because there is not a number n which added to its sum of digits gives 21847016.

It is not an unprimeable number, because it can be changed into a prime (21847013) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5270 + ... + 8453.

It is an arithmetic number, because the mean of its divisors is an integer number (2573250).

Almost surely, 2^21847016 is an apocalyptic number.

It is an amenable number.

21847016 is a deficient number, since it is larger than the sum of its proper divisors (19324984).

21847016 is a wasteful number, since it uses less digits than its factorization.

21847016 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13928 (or 13924 counting only the distinct ones).

The product of its (nonzero) digits is 2688, while the sum is 29.

The square root of 21847016 is about 4674.0791606476. The cubic root of 21847016 is about 279.5529259958.

The spelling of 21847016 in words is "twenty-one million, eight hundred forty-seven thousand, sixteen".